not sure if you'll be able to find a door in PK, but you should be able to get one made (not a ver good one though). best bet is to ask Aabir to grab you one from the uk.
DO NOT put power steering on it. no early VW needs power steering.
fit waht is comfortable. but nothing beats the stock seats (speaking from experience)
whoever told you that needs to get his head examined. beetle seats fit straight on (they are the same).
honestly i think those wire wheels loook horrible and will not suit the thing. however it is all a matter of taste. If you decide to fit them, may I please purchase (at least) one of your 5-bolt steel wheels off you? as i'm missing my spare.