Hey James - how ya doing ?
If you take a look on Ebay.co.uk - you'll find two TW200's currently for sale (both over priced)
The other guy who seems to import them on a regular basis is based in railway arches W12 - sure you'll find him
The State side guys on here have far more experience with the bike however - and I'd suggest hooking up with one of them for a more in-depth review ......
(P.S. - the RV125 Van Van also comes in the 200 format - mostly from the supplier in Reading)