Not a million miles away - volksautos in Sutton (just off A217) are good, used them numerous times to fit parts I supplied. Probably a 15-20min drive from Wimbledon?
Tuningwerkes in Croydon also good.
I used Mastertechs in Morden a few times before I found Volks autos. Not used them in years, but they're quite close to you.
Sent from my iPhone using Tapatalk