Not sure about Bronson but Powell sells cages......it's pretty cool I think.....a good reason to order through them, get some extras sent when you buy em.
When I've been stoked or bummed on Powell stuff you just email em and you get a response.....you should try it w Bronson maybe they'll mail you some replacements.
I had Super Reds that broke really fast (4 broken crowns, 2 bearings didn't spin) and asked them to utilize the warranty that comes with the product (part of why I bought them) and after some back and forth they just shipped me some replacement crowns. The crowns weren't the only issue and it's a pain in the ass to replace them. Really dissatisfied with SkateOne/Bones/Powell's service on that. They sold me shit bearings that were marketed as good, and then said "okay fix it yourself" without even giving me the tools to fix all of the bearings.
I'm really trying to show love to my local skateshop, but they're only stocking these shit companies like Bones and Bronson. I got a pair of Swiss and we'll see how they run, but I don't have high hopes.
I'll probably buy some downhill racing bearings or something if these don't hold up as most skateboarding companies make terrible products.