aftermarket 3pt seat belts

Ive been thinking about getting started building on my 59 f100 4x4 daily driver again and got thinking about seat belts. Would be interested in sources of good quality American made 3 point seat belts. Looking for all metal buckles and universal fit of coarse. Not really decided on retractable or not but im leaning toward retractable for convenience. Would also be interested in any articles concerning proper 3pt seat belt geometry. Im thinking of building a tube frame cage type thing for behind the seat so as to have mounting points tied straight to the frame. Thanks for any help

 

Check Julianos. They have a good selection of seat belts and attaching hardware.

 

I was wondering if any one had used Beam's seat belts. If so i would be interested in any opinions.