I see the new Cooper Model 51 repeaters are out, but they're based on the 21 action, so that won't help...
Have you considered the mini-Mauser CZ 527 in .221FB rebarreled to .17? I've heard of guys doing that; even still able to use the d.b. magazine with slight modification. I'm thinking of going that way for a .20 VarTarg. CZ was moving towards a 527 in either .17FB or .20VT a couple years back, but unfortunately that probably went by the wayside.