Those are pretty trashed, you can get same ones in much better condition (or new) for just a little more $$ from US ebay. These all ship to UK.

Proton:
http://cgi.ebay.com/Hot-Wheels-Isuzu...1#ht_861wt_726

Silver:
http://cgi.ebay.com/1999-Isuzu-VehiC...#ht_1477wt_754

http://cgi.ebay.com/Hot-Wheels-2000-...#ht_1389wt_754

http://cgi.ebay.com/2000-076-1999-Is...2#ht_500wt_741

http://cgi.ebay.com/First-Editions-I...1#ht_500wt_741

Foxfire:
http://cgi.ebay.com/HOT-WHEELS-ISUZU...#ht_3348wt_762