WOW over a year and a half and you got your first post sorry had to say it.
I can't remember how they are set up, it's been a while since I took mine apart. But scroll down about 3/4 or a little more and this site shows them.
Mini 14 Accessories Ruger Rifle 30 Muzzle Brake Gas Block Compensator Steel Bedding System
This place seems to specialize in them, maybe send them an email
Accurizing the Mini14 - Great West Gunsmithing
And don't forgot to look through some of the threads in this section, I know there were a few places that sell parts posted