I'm with Danno. Can you weld? There are actually several members here that have made their own subframe......... just a matter of money / ability. A few years back i made one to mount a Woods BH6000 on a mid-eighties Yanmar. I had a local steel fab shop cut most of the materials and punch some holes, but I did all the fitting and welding in my driveway. I wouldn't claim it looked like a current factory subframe, but it was plenty strong, and pinned onto the tractor easily. I would guess I had about four hundred dollars in materials. Even if you paid a fab shop to do everything..... perhaps you could find one who could do the whole job for not much more than buying a subframe??