Their rifles with the Montana action are very closely along the lines of the Winchester Model 70. Virtually any stock that will fit a Winchester 70 will fit these actions with little work. The actions are all investment cast, same as Ruger. When they first came out they made you a screaming deal on an action just to get their name out there. Go to their webpage, they should have prices posted as I recall. Wayne at Oregunsmithing builds customs off of them all the time with no complaints as far as I know...he has a web page as well.
I'd post both links for you but I have so many in favorites I can't see em at the moment. Do a google search you'll find them.
RR