Got mine off Gunbroker, with a brand new factory frame, including the letter from the factory. They aren't hard to find. It also helps that I have my FFL too.
Most people dump 12 rds. of factory ammo through them. Take their broken hand and peck out an auction or a listing on GunsAmerica and try to recoop some of their money.
They are one of the easiest .44's to find. Sometimes the price is a bit steep, as they are almost unused guns, and the owners want to regain their money. Good Luck on your quest.