I've broken a few bulkheads. Integy makes an aluminum one but that sounds heavy and will likely bend under the weight of gravity like all of their other stuff.
I've been driving pretty regularly lately. The only problems have been blowing a bead each time so far. I'm running dirt works, 88/19 and running 3s and temps have been about 120 on 80 degree days. I think I am going to phase out 2.2 inch wheels and stick with 2.8's from now on.