Almost 1 year bump.
Still looking for one of these oddball 2" x 3" rectangular Volvo OEM drawbar's, tongue, ball mount etc., etc. I can't believe I passed one up at our local PnP a few years ago, it was rusted in and I didn't have a hammer or PB Blaster with me, why I didn't go back later is beyond me.
Other option I saw on TB is to weld in plates on either side to make a conventional 2x2 hole that will accept off the shelf drawbars? Also have wondered about welding 2 pieces of channel together to make a rectangular tube, I have no idea on dimensions of stock steel so maybe that sounds really stupid??