You don't have to look in the UK. Try WildBros.com right here in the USA. Carries all kinds of cool stuff including Otec and the 300mm single sided swingarm.
I have complete Galfer Satinless steel line kits for sale. Kit includes: front brake lines (2 or 3, you pick) clutch and rear brake. All new in the box. Fit all year Vmax. $175 plus shipping. Drop me a line at [email protected]
PCW in NY does a great job on chain drive. I beleive their site is www.pcwracing.net I know their number is 518-346-7203. Call in the am because they are way to busy in the afternoon.