In need for a 9x19 ar platform magwell block

Good afternoon ladies and gents, I am in search for a affordable magwell block for my ar platform build. I was considering buying a proprietary 9 mil lower but i have a few lowers and would love to just add a magwell block to one. I see that the market has a few but for 200 that is a little steep for me. I have seen other options but would like to get some reviews and comment from people who actually have them. If anyone is trying to get rid of one, I am interested. Please share your experience.