Anybody know who makes inserts for the accessory rail on the underside of SSS stocks?

I fabbed a few up out of aluminum strapping and tapped them for 10-28 screws, by I'd rather have some steel ones if I could find them.

I'm trying to attach an aluminum block that fits my front bag onto the bottom of the stock. What i have right now is working, but I don't know how durable it's going to be...........and my filing job looks like crapola....At least I learned how to tap threads straight....

Elkbane