I made a scope mount for a 23D out of basic 22 dovetail stock bought from Brownells. I drilled it to match the three holes at the rear of the receiver and then cantilevered it a bit over the ejection port. Obviously you need to use 22 dovetail rings, which held well with the 22 Hornet.
I too have used that dovetail stock from Brownell's for projects beyond what it's intended for. The latest venture was to adapt a 6" piece of it as a base for mounting a scope on an old German
kiplauf .22 Hornet, by drilling holes to mate up to existing threaded holes in the narrow top flat of the octagon barrel, milling the bottom to reduce overall height, and then milling the sides to taper down to the width of the flat. The biggest hassle was in finding rings to fill my needs- mounting a 3/4" vintage Redfield 4x (looks like a scaled down Weaver K4). I found a set of vintage Redfield 3/4" rings of tip-off style and I was in business, and I remember there being nicely sculpted 1" rings floating around out there too that would've worked also. Joe Martin has seen (and shot) the gun.
My point is, that Brownell's tip-off dovetail stock is pretty versatile for offbeat applications. Mating it to a round receiver will require milling a radius in the bottom surface though- no big deal for a gunsmith with a mill (or better yet, a local machinist or hobbyist).