You can use open cloud:
If you need any specific features just reply to that thread with your asks. (guessing you need group management API or so?)
The issue is that in this instance, the change is actually highly beneficial for 95% of users (regular users who are often the target of cookie theft). It’s worth making this change for that reason. I’m certain you’ll figure out how to work around this constraint in the mean-time. For example you could rent a cloud machine with a fixed IP to get around the issue.