RE: I'm a Flyer not a builder
Where is San Leon? Some one might be able to come by and help you with it. It doesn't look bad. I would make a new rib for the one closest. Then cut the sheeting back to the rib that is still in place and has sheeting on all of it. Make the front half of that rib so you can glue on new sheeting and square off all the damaged sheeting and go on with a new piece, cover and you're done. IMO. Oh, you'll need to clean of that spar too, it looks like it's still in good shape.