Try Rich Dettlehouser at Canyon Creek
http://www.canyon-creek.com/
He built a Hi-Cap limited gun for me using a Springfield HiCap frame and STI top end parts, which can be seen here.
http://www.brianenos.com/forums/index.p ... opic=25378
The post also includes a short testimonial. Rich was awesome to deal with, quick, and great quality work. He's also a Limited and Production GM. Rich also has pics of his work using Caspian frames and we discussed building one using those, but there were, and still are no mags available for limited. My friend had him build a Caspian limited gun that was outstanding. PM me if you have any other questions.