
Hi Johny,
You don't say a "bull" what? Do you mean Bull Terrier, Staffordshire Bull Terrier, Bull Mastif? Without more info it is difficult for anyone to help which is why I think you've not had any response.
If you do a search on Google for the Scottish Breed Club of whichever exact bull-breed it is you are looking for, they should be able to help you locate someone with some of the same lines as your previous dog - assuming he was actually KC registered .
HTH, Regards, Teri ;)