Part needed 72 20’ SF

[uncleboo]

I suspect they used the same mounting hardware with either of the layouts, if someone could confirm. Mine was the 2 low rails that had the fittings on both ends. I'm fairly confident they will work for you. Got the rails and the rear fittings at the shop. Will check them and get back with you.

[Coppertop]

Hello Zachary, Yes I believe they are bronze (heavy duty).
Uncle Boo, thank you again

[uncleboo]

just checked and, unfortunately, mine are aluminum. You can still have them if you want.