Join the net54 Fe forum at
332-428 Ford FE Engine Forum and place a WTB ad with your location. You might find something good close by and trade/sell your TO block in the process. Lots of traffic there and many members buy and sell and some don't advertise but have a stash of goodies. I have found and bought almost everything for my 427 build there and made some very good friends in the process. A ,lot of good parts pass through here too so keep and eye out. Try some of the old ads you see here. I bet you'll find some of the sellers still have them.