Some pictures of other plates I've already done a while ago. These are mostly dug out from the Show Off thread.
Macedonia:

Serbia:

Slovenia:

(picture by doge)
Netherlands:

Greece:

I also have some Danish plates I can't find the pictures of and German plates I have no pictures of. UK plates I've just made with an online plate maker, which I'll credit upon release of the mod.
Added 10 minutes later:
Oh and I almoast forgot, Bulgarian license plate:


I might add the square version as I do have it made.