Semi-auto .17HMRs aren't perfected yet.
Henry does make a .17HMR levergun, though; action is faster than a boltgun. Never handled one so I couldn't comment on their quality, though Henry is a pretty good name.
No semi-autos, eh? Hrm! I didn't know that. What's so difficult about engineering one? The bullet not heavy enough to generate enough recoil to work the bolt?
I believe Volquartsen makes a 17hmr semi. Now being they are in the States there would be plenty of hoops to jump through to get one up here, but...