Need help finding a good dumbphone - no results seen in the Dumbphone Finder!

Hey y'all! First post here, and also first phone I'm looking for.

I've got core guidelines and I've also got personal preferences I'm looking for. My cores are as follows:
- TRUE Dumbphone, no Android or internet access.

- North America connection availability

- Group chat capability (or more specifically not one that's a slog to deal with)

- Calls... duh.

- Flip phone!

- Budget-safe price range

Those are the main things I'm focusing on. The rest is moreso things I'm leaning to, but I don't expect I'll find a phone that includes ALL of these traits. Don't worry if your suggestions don't fulfill all of these:

- As barebones as can be... I've got other devices like my laptop and PSP that can take the place of any extra features and apps!

- Keitai-esque design... I know they don't work well in NA, but I just really dig that long form factor and screen!

- Plain outer shell... I've seen a lot of phones that fit all the other traits, but have a lot of extra bulk for a "rugged" design, and that just doesn't stick with me. That, and the extra screens on the outside seems kinda tacky for my taste.

Thanks for any help y'all can give me! Remember my top list is priority, the bottom is more of a wishlist than anything.