After waiting and waiting I finally ran across a decently priced 610. This one is a 610-2, but sure isn't like it came from S&W.
The previous owner had the 3" barrel removed and a 4" tube installed, some action work so the double action is right at 7 lbs, replaced the front sight, chamfered the chambers, and fluted and chamfered the front of the cylinder (like the new ones from S&W). There is also a ball/detent lockup on the yoke. The grips are round to square butt conversion grips by Ahrends.
It was built to be an IDPA gun, so it should be just fine as a carry gun.
Along with the gun I got the original 3" barrel and about 70 full moon clips.
Before the cleaning, which will happen tonight.

I am in a much happier place for now.
bob
Nothing witty or earth shattering.