Let me add my welcome to the LugerForum.
There are a number of members here in Michigan, and around the Detroit area.
Big Norm tipped me off to the Michigan Antique Gun Collectors show, held in Novi - but I'm not sure of the dates. I haven't been to the Birch Run shows, but that's another possibility.
There have been some top rate .45's pictured here in the other firearms section that belong to members. I've been looking off and on locally too, but haven't found one I was interested in.
Keep your eye on the for sale forum, and learn from the forum members around here.
Fritz.