Very creative, good job! As for another source of pins, you could probably import pinning sets to Poland depending on the laws, as it would be very hard to make key pins at home as well. Also, by saying picking is illegal in Poland do you mean that the sale of locksmithing equipment is illegal or the act of picking itself even done on a lock you own is against the law?
For example what if you use two paperclips to open your file cabinet/desk drawer at home because you lost your keys? Are you breaking the law when you do this? If so that is ridiculous!