Isso não é muito elegante, mas esperamos que a ideia seja transmitida:
ssh localhost -p4444 \
"find ~/tmp/ -iname \*png -exec \
sh -c 'echo mkdir -p moo-diles/\'dirname {}\'\;\
rsync -e \"ssh -p 4444\" localhost:{} moo-files/{}\;\
rm -i {}' \; "
(...)
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/tile; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/tile/veins_2.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/tile/veins_2.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/tile/veins_2.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/menu2.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/menu2.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/menu2.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_2.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_2.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_2.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_2.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_2.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_2.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_up_3.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_up_3.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_up_3.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_3.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_3.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/bar_vertical_3.png
mkdir -p moo-diles//home/jaroslav/tmp/eterm/usr/share/Eterm/pix; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_1.png moo-files//home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_1.png; rm -i /home/jaroslav/tmp/eterm/usr/share/Eterm/pix/button_arrow_down_1.png
mkdir -p moo-diles//home/jaroslav/tmp/transcode; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/transcode/track14.png moo-files//home/jaroslav/tmp/transcode/track14.png; rm -i /home/jaroslav/tmp/transcode/track14.png
mkdir -p moo-diles//home/jaroslav/tmp/transcode; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/transcode/closeup.png moo-files//home/jaroslav/tmp/transcode/closeup.png; rm -i /home/jaroslav/tmp/transcode/closeup.png
mkdir -p moo-diles//home/jaroslav/tmp/transcode; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/transcode/track15.png moo-files//home/jaroslav/tmp/transcode/track15.png; rm -i /home/jaroslav/tmp/transcode/track15.png
mkdir -p moo-diles//home/jaroslav/tmp/transcode; rsync -e ssh -p 4444 localhost:/home/jaroslav/tmp/transcode/track10.png moo-files//home/jaroslav/tmp/transcode/track10.png; rm -i /home/jaroslav/tmp/transcode/track10.png
(...)
O que está sendo feito aqui pode ser chamado de "metaprogramação" porque para cada arquivo encontrado, simplesmente repetimos mais comandos para executar. Esses comandos devem ser executados posteriormente para processar cada arquivo. Você será aconselhável colocar os comandos que vêm em sh -c '<here>'
em um script no servidor. Dessa forma, você evitará perder sua sanidade mental ao tentar escapar das coisas corretamente e ler um comando com três linhas de comprimento.