It is easiest to buy a breed cat direct from the breeders. Which means you get a good example of the breed however this is an expensive way to get a new cat and of course this helps the breeder shift unwanted stock rather than helping a shelter cat.

However there is another way of adopting a purebreed cat, you can go to a breed specific rescue and do both...get a papered pedigree and save a life.

If you had got the girl you have set your heart on I would not of posted but as you are still looking around and thought you might like this information.

Pure Breed rehoming charities for Scottish Folds and American curls.

http://www.purebredcatbreedrescue.org/scottish_fold.htm
http://www.purebredcatbreedrescue.org/amcurl.htm

Complete list of other breeds
http://www.purebredcatbreedrescue.org/rescues.htm

Good Luck