Sorry to hear about that, been there too. If you don't mind a little work, you can probly still save those hackberry staves by chasing a ring. I've removed up to 3/4" from one to get to a good ring for the back, and just about finished another that's looking good. Even found a few borers that i had to work past anyway to get past some brittle wood. I don't find it really any harder than chasing a ring on osage, just different. Once you get to the inner rings, they can be decently thick. I hog off all but the last few rings with a hand plane set course, but i'm sure there's other ways. If they're pretty straight maybe you can take a band saw and rip off the outer wood by faceting?
Just saying . . .