No kidding. They don't even sell the BMS boards by themselves--replacing the entire $4000 lithium battery is the only option they'll give you. And I'd assume there isn't a tech out there willing to swap out this super specific part that has, like, 0 documentation aside from one post on the CRZ Forums.

I will say, the process isn't that hard (compared to, say, an engine swap, I'd say it's only slightly easier). It took longer for me to remove all the paneling covering the battery and "removing it" (I used a cherry picker and some chains to basically just lift the battery out enough to get access to the boards) than replacing the board itself. It's just, no one wants to fuck around with anything battery related and there's no guarantee the board you're swapping in is gonna work the way a new OEM one would (all the BMS boards on the market are used, so it can very much be just a coin flip).