Bluealts (dot) net theoretically has accounts. I can’t speak for others but I may have hypothetically gotten access to a NordVPN account that has a recurring payment plan in place which has been happening for at least 8 months. Additionally I’ve managed to enable 2FA on it so that only I can use it. Also maybe check out h-gen (dot) to. Not sure if they work but it’s worth a try.
https://smile.amazon.com/GalSports-Exercise-Anti-Burst-Supports-Stability/dp/B07TF79Q8C/
I have something like this. I'll use it for a few hours a day and it forces you to have good posture. I use that with an Ikea chair that gives me good back posture.
Hopefully I won't have too many back issues.