Lukasz,
If you can't come up with anything, I'll get a set from Grady and send to you. I send packages to my grandfather and cousins in Germany all the time, so I am familiar with foreign package shipments.
What part of Poland? (town and region) I work with a few people from Poland here in Brasil who travel back and forth monthly like I do, and may can save you some on shipping.

Cheers,
Virgil