There are a number of creative ways to extend the brace, depending on your skills, tools and available materials.

For example you can get a piece of 1/4"=5/16" OD tubing of some sort, from copper to stainless. Mash and drill one end to make an attachment point. Cut off the flat part of the existing brace, and overlap the tube into the V shaped section 2" or so. Bed it together with a filled epoxy like "plastic aluminum" and wrap thin wire around the way the loops are held on fishing rods, or drill holes and hold it together with pop rivets.

Plenty of variations on the theme are possible, such as using the tubing, or even decent bamboo chopsticks as a central splint, attached by whatever work.

I do this kind of stuff by opening my mind to possibilities, then wandering around looking for something that leads to an inspiration.