Im currently looking for a breeder in the south of england, (can travel further) who breeds these dogs.
Im not fussed if the dog is pure white, or champage, but it MUST HAVE A STRAIGHT TOPLINE!
And be big boned!
Temperment and Health are my main priorities.

are there any breeders anyone knows of, who breeds such dogs? 
gems_dogs@hotmail.com

Try these people http://www.walcss.co.uk/

The White and Long Coat GSD Society.

Guest
PLEASE be careful...I know of a person down south(kent) who bred (and still may do) white GSDs using a bitch with a hip score of 53! She was not bothered about the sires score either as long as he produced whites.
Archer

I have heard of this woman and have not managed to ever find out who she is.  Ask to see all relevant health check certificates.