Tactical Sauce recently unveiled their new exotic line of Glock magazine base pads. These magazine basepads are available in aluminum, stainless steel, brass, and highly sought after Timascus.
Tactical Sauce states these magazine floor plates are Glock 19/17 pattern compatible. If you are looking for Glock 21 pattern some may be available for purchase. I would reach out directly to Tactical Sauce. These are expected to go fast!!! Proceed quickly!