What should I be looking at?
Most of the RimX actions get put into a chassis or one of the stocks that are set up for adjustment of the magazine height. I would be hesitant to use any 700 bottom metal that does not have a provision for that. Feeding the 22Lr from the large magazine requires it to be aligned well. There is a strong NRL22/Positional shooting community in Canada with a little searching Im sure you can find most anything you need.What should I be looking at?
You still have bottom metal?They recommend the Hawkings M5 bottom metal. I may have a lightly used one for sale if you're interested. Either way they work great. You just may have to time your magazines to the bottom metal once it's installed but those mags are easy to time.