What style of extension's do you have. Manual fold or electric fold. Carry and mauer have ones for manual fold and a case ih dealer in Indiana has a guy making them for the electric fold style, J & L equipment, for around $3,000. I've put both styles on
He's a good customer of J & L, large farmer, tractor puller, I was told by the salesman, I got an email he sent me I could forward it to you, pictures of one on a combine, supposed to hold 400-410 bushel now.