Fabricated a new F-710B out of a piece of 1x1x1/8 6061 T6 angle. I know it’s the right stuff, as it still had Vans' part sticker on it. ;o)
While I was at it I also noticed that I incorrectly fabricated the similar part on the F-711 bulkhead out of 1/16 thick angle instead of 1/8. Oh well, I guess the removal of THAT part is next...