Try calling these folks and speaking with one of the teachers of the precision machining.
Greater Altoona Career and Technology Center
I bought two of the rests and they are well made and are stout.
Frank Grappone out of Clymer Pa. a Williamsport 1000 yard club member is who I bought mine from Phone #
I think they were 180 or 200 but have all adjustments needed and will accomodate a wide forearm.
They are projects made by the kids I think in their 3rd year .
I will try and get a picture of one on here. My digital camera is an old model and I have been having trouble with interfacing it with XP os.