could print or have something like this made with a printed force bearing, to prevent the rolling up as you are referring too.
It looks like the simplest way to get it is to pick it up next time he lists it, or have Hooligan snatch it for ya. He wants the money, that's all. No
That's pretty much what I had pictured in my head! I think it'd be pretty slick without any visible linkages, squared off, and with a .45 frame.