Well, I don't know if it can help but CEN in italy is represented by SCORPIO s.r.l.
They have a nice website, I can order and pay by C.C. and if I order within noon I get the parts the morning after.
Minimum order 50€ includin 5€ shipping. It's a real great service (with the genesis you need it...[]) you can try to ask them if they can ship it to G.B.
They reply to my mail within hours.
try.

www.scorpio.it click on the genesis picture, either scroll down and click on "tutti i ricambi" or on top in the box "cerca" digit the # code of what you need and check if it there (they have 90% of the spare parts, the prices are more or less the one you can buy in USA but for me the service is great!

Good Luck

Ciao