I'm with brentacre at the moment. They were the cheapest come my renewal time and they had the best mods policy. Power was capped off at 115hp for the 8v engine (standard power) but I could include exhaust and air filter and ANY cosmetic mod and they were free to declare, so no extra cost for suspension, wheels, spoilers, etc....
They are VW specialists so give them a call, worth a try I guess!