Bartek,
We don't plan Polish versions, while am think of a few T-55 based Special purpose vehicles, like early BTS and BTS-3 (close to WZT-2 if not the same), Type -653 (chinese recovery) and ????.
There are few Polish companies (namely ARMO), who can do a conversion set into BGM-67m2 - it's much easier to create engineering vehicle in resin (too many small parts)
Sincerely, Alexey.
http://www.acemodel.com.ua (Europe)
http://acemodel.tripod.com (America)