A friend of mine who has two shih tzu may be able to help you here. There is another forum that she is a memeber of it's http://pub61.ezboard.com/bshihtzuchatter
post your message there and I'm sure you'll get some help finding a puppy.
I currently have an 11 year old shih-tzu female, and we have been interested in getting one at a reasonable price, but we have not be able to find any. Any help?