You could go directly to "Gravel Agencies" Remington's Canadian representatives who will order the part for you. My guess for complete S/A bottom metal with all the parts including magazine box you could be out $250 cdn. If you keep an eye on the AO buy & sell posts you will see them come up on occasion, even if it is blued you can have it bead blasted to a silver alloy appearance. Prices on the used market understandably are all over the place but if its under $100 jump on it. Good Luck. D.H.
I have one same as in pic ...The detach mag bottom metal in the pic fits flush ... so if fitting to a stock designed for a hinged floor plate, requires inletting to enable access to the release button.