I know some folks here have talked about these here in the past, so.....
Ian over at Forgotten Weapons highlighted a LAR Grizzly Mark 1 in .45 Magnum coming up for auction at Rock Island. For those that don't know, one of the most reliable auction houses for firearms.
Anyway- gun looks to be in excellent shape and comes with a complete 10MM conversion kit. They didn't make a whole lot of them, so, if you're in the market, expected range between $1300 and $1800.
The link to the auction house is in the video description:
https://youtu.be/vDqmi4ID8SI