This is the 2nd base plate this super nice guy has made for me. First was the 21a awhile back. Should be receiving them any day now, but seems like a good price if they work.
https://allarms.net/product/allarms-cz-scorpion-rps1-magazine-baseplate/
https://allarms.net/product/allarms-cz-scorpion-rps1-magazine-baseplate/