I just bent up my own out of .063. Installed with four #8 screws and nutplates.
If you don’t have a sheet metal brake, and know how to use it for the required bend radius, sandwich the sheet between a couple blocks of wood and hammer away.
Super easy part to make if you can’t find a vendor still making them.
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.