Icons needed

I need few icons for my java freeciv client. They should be square,
between 40x40 and 60x60 (but all the same size), preferably truecolor +
transparency.

List so far:

- build city
- sentry
- fortify
- wakeup
- autosettler
- autoattack
- steal technology
- spy city
- establish embassy
- icons for each terrain type - for example tree for forest
- create road
- create railroad
- disband
- goto
- diplomant buy unit/city
- unload
- raze city

If anybody knows of any fitting icons which are unfettered by anything
more restricting than LGPL(for icons???), or wants to contribute and
create them, please contact me.

Artur