Tai
Have you tried the Bichon Club of Great Britain (Can't do links but stick it in google and it will come up).
There are several good kennels in the UK and the Bichon club should be able to give you details of these. Chris Wyatt's book Bichon Frise, An Owners Companion ISBN 1-86126-196-9 gives information on some of them.
There are LOADS of puppy farmers in Bichons so beware. PM me if you need any more help.
Andi