After looking at this one I have a few ideas.
I know where I can get an almost unlimited supply of 7/8" alumimum tubing, it's .030 wall and would be more than strong to do the job. My buddy also has a load of stainless 7/8" .080 wall tubing also. he sells it to me by the pound and it's only $.50 a lb. for 5 bucks I can get alot of aluminum tubing.
Wood is not to expensive and my dad has a wood shop he can no longer use (he's 91). I think I'll play around with it since there is now 2 inches of snow on the ground and more on the way so outdoor shooting is on hold for awhile.
Keep you posted on what I come up with.