After getting a cancellation from Wilbers USA (no longer being supplied by Wilbers in Germany), I spoke to John Gaskell at Revs Racing in Halesowen, West Midlands. They are importing Wilbers and speak very highly of the product.
I have ordered a 630 front and 640 rear with the 625 remote preload option, delivered to my door for a mere £15 more than the deal I was getting from Wilbers USA ( even with the current excellent exchange rate ).
If you are interested, call John or Pete on 0121 501 3321.