If you require surface finishing and you are in the north east (although a postal service may be possible) try the firm detailed below. I have just picked up a pair of silencers, a pair of saddle springs and a pair of fork top nuts that have been stripped, polished and re chromed for my 4g. A really nice job, all for £100, but it did take a month, however worth the wait.
contact:- MIDAS TOUGH, Unit 2, Eagle Motors, Cinder Lane, CASLEFORD, WF10 1LU, tel. 01977604040. http://www.midastouchgb.co.uk