John, There is a Polish company producing decals for Polish Railways as well as logos of Polish companies for trucks. You can find their shop here: http://www.kalkomanie.com/ Unfortunately the only Z item is a set of Polish decals for Marklin German locomotives. You can repait using this set several steam and one diesel locomotive. I asked them to prepare some decals for PKP gondolas (2 axle and 4 axle). There are 3 different numbers for 2 axle and 3 numbers for 4 axle. The problem is that 4 axle are not very good - lettering is not sharp. This is probably the reason why they do not offer those decals on their page. Here are the results I got by repainting Marklin 4 axle gondolas and using those decals: In case you are interested please let me know on PRV - I can try to contact them privately.