Awesome sell the Helix for £469, but if they have none in stock, there is currently a 3 week lead time from the date of order. I think they are 16 or so kits behind and they are hand made, so take some time to make.
When you order it, you need to specify SACHs or LUK flywheel. If you don't know which FW you have (VW changed makes circa 2007), just buy a new LUK FW from EuroCarParts anyway, and get the clutch to match.
Alternatively, there is the SACHS SRE Performance clutch which is rated to 400lbft, but the feedback I've read on it is very heavy pedal and judder when taking up the bite. Neither are what you want in heavy traffic.
My original clutch at 85K has just started slipping in 4th and 5th at 3500rpm, following a remap, so it's not a case of if, but when. To keep costs down, you can go for another stock clutch (£240 + FW) which will be fine for the first half of it's life, but it will slip again after that.