How about a stock factory bar off a 1/2 ton pickup that measures 36" between the eyes? I'm running one on my "other" truck....it's mounted to the top of the diff with the stock hardware and points to the rear so it doesn't interfere with anything. The eyes are horizontal.
The donor was an early 80's 1/2 ton FoMoCo. I'll add a pic to the "Just An Old Truck" album of my webshots if you want to check it out. Hope this helps.
Dave