Fixing Tab on Bulkhead

[TxHawk]

I am looking for opinions on this repair. I have a broken tab on the bulkhead behind the rear seat. The bulkhead only ties into the sides about 18-20" worth and to a narrow portion of the deck that runs above. Below it is the fuel tank, so it does not tie into the bottom. It has all the trim pumps mounted on it. This is a small repair for the cost of materials required.

Any recommendations on what to use and specifically what cloth?

This is the only picture I have. Pardon the unfinished rigging. The tab is on the right in the corner around the battery and up.