I believe in you.
I made the Auto-talon in my sig with a Dremel.
If you have access to a drill and a Dremel you can do a Pneumag. Use some aluminum flat stock maybe a 3" piece of .5" wide by .1/8" thick where the front grip screw went through the rail to attach the pneumatic ram to the sear. I'm going to make you an awesome Microsoft Paint rendering to show what I mean.