I know there were some that were public forums that didn't show downloads without a login, not sure which were up as I'm out if the loop and they keep getting drama'd.
The best group in existence for certain western animation is WMAA, a literal archival project, but I think its all in a Discord with a protected Google Drive. I can ask if they have public invites (AFAIK they arent sekrit club types, they just dont want to be taken down) but I doubt they ever did that.
I'd DL and upload if my internet wasn't complete shit. Any requests?