hey leigh, it's ed!
i've dealt with EKW auto wreckers on the mainland and they were pretty good, sent me down a complete RB20DET, loom and box for an old conversion of mine, i can't see why they couldn't send you a rwd 4A and associated parts, but firstly you really need to nut out what you need for the conversion
gimme a call or i can drop round and we'll have a beak at her, see what we need to do.