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All help will be greatly appreciated.
You could look at http://www.monstercable.com/monstergame/ps2/
The do a high-quality component set, but I don't think they supply the UK directly - you could always mail them to ask if there's a UK importer.
As for DVD green-screen, I'm not sure. I would think you'll still have it, as it uses separate red, green and blue (RGB) signals - which is exactly what you get via RGB SCART, it's just that the connection plug is different.
All help will be greatly appreciated.