Yeah, I mentioned this briefly in the Audeze thread about the creaky/squeaky Focal headband as well. I’ve not heard of any reports of Stellia headbands breaking though so maybe they’re built better than the lower end models.
I had a spare Audeze headband lying around from a replacement (ordered one with a shorter lohb strap) so thought to give it a try. Not sure how easy or hard it is to purchase the Audeze yoke kits these days. Still, the HiFiMAN headbands are a “cheap” rescue, as you say, and readily available.
Yep, the drivers are easy to disassemble and swap out. The Stellia → Radiance driver swap is an easy task.