Ken you are welcome

The gallery rifles used the standard bolt and firing pin.

Getting that rifle set up for rimfire might be less expensive than you think.
Some of the rifles were set up with the bore below the firing pin axis, some were set up with the bore above.
Extraction wasn't common on all of them.

Your project wouldn't need to be a clone of any of the original rifles, as yours is no longer all there anyway, and you wouldn't need to alter anything with your action or bolt to make it happen.