This all started when I returned my founders edition. I regretted it. Now I am scouring for another founders edition code.
Questions
Where do I put the code once I get it?
Will I be able to claim it on the same google email?
Did you activate your original account? If you did then perhaps you can just still log in with that. Otherwise Stadia free platform with 2 months pro has launched so you can use that, but maybe not with the same email - try it on the website and see what happens.
I tried asking one of the support channels but mo luck yet. Let me see if I can find it on the web version of stadia. I can't see a redeem code on the app
Good luck and welcome back!