Who Makes a Good Clamping Pipe Stand?

I want one that would be suitable for holding one end of a length of 3" sch 40 securely while beveling the end with a mechanical internally clamping pipe beveling machine.

And it needs to be US made.

Ideas?

cut a 2" wide pc. of 8" pipe, cut about 5" out of circumfernce, add flat bar to fit head of jackstand, weld bolt from c clamp in center of clamp, best pipe clamp in the field

i made this a couple of years ago. i'll see if pics come through.