So, I went ahead and coded it for him (the code is on Github).
Here's the X/Twitter post with the video showing how it works: https://x.com/HugoHamelcom/status/1821604441457582493
You can access the tool to bulk unsubscribe Stripe customers here: https://hugohamelcom.github.io/stripe-bulk-unsubscribe/
Hopefully that helps!