Have you tried inquiring with anyone from this list? I know that they aren't necessarily in or directly around Buffalo, but it's a list that I went through when I was looking for a pup more towards Syracuse. I didn't have any luck, as I was looking for a red/white female at the time, but I do recall one or two of the breeders responding that they bred tri-color Pembrokes. You could also try the PWCCA website if making a trip to, say, Ohio wouldn't be out of the question. I think I remember there being a breeder in Ohio that was about a 2 hour drive from Buffalo, but I might be off on the travel time.