Big:
I just got mine, so far I like it with a few exceptions. Trigger pull is around 7#. Only have about a box and a half through it and had 6-7 stove pipe, hoping that will clear up with more rounds through it. going to put a couple hundred rounds through it this next weekend, should be able to tell you more then.
The piece is well made as I would expect a sig. to be. Accuracy is way better than I expected from such a small gun and short barrel, if the trigger was down around 4.5 to 5# it would please me more I'm thinking, but I hesitate to alter a CCW gun, should I have to use it, Lawyers will tear you to pieces. Don't know if the factory will lighten it or not.
Too answer your original question, several stores in Billings, Mt. seem to have a good supply and my friend in Grand Junction, Co. said they were available there.
Bob