Remington also offered their model 597 in .17HMR although I have recently read somewhere it has been discontinued due to "problems". There may still be some on shelves somewhere, which would be much cheaper and easier than aquiring a 10/22 mag and converting it, but beware of why the 10/17 and the 597/17 are not available which is they tend to blow up from time to time....I believe the 597 is still available in .22WMR though.
I believe the issues with the 597 were fail to feed and fire out of battery related