I think the B3 seats ought to fit, but don't know for sure. Why don't you ask about the B3 heaters on the vortex in the
Passat section? FWIW, the leather panels (in the seats) are different B3-B4, but unless you see them next to each other like I did, nobody will notice.
Also, to get the leather door inserts, you have to buy the whole door panel. These are more difficult to find because many yards want you to take the whole door. Unless you show up to disassemble it yourself maybe (worked for me
). Try calling places on
Car-part.com and ask them about availability.
Good luck!