well i eventually went for one from
www.piedog.com. it was 54 quid including delivery and VAT. i check out the GAK site, and although they were charging 50 quid for the interface, they wanted to charge me 10 quid for delivery, which i think is shit. delivery and courier services are a commodity, thievin' bastards.
anyway, i'll post here in a week if piedog are a bunch of dodgers that i shouldn't have bothered with.