I’m not sure if you have already but Etsy has some listings of fursona tails that touch and drag the floor that would probably be long enough:
You can always contact a few shop owners and ask directly if you’d like something longer than they currently have available.
Also, I’m not sure if you’ve considered this but to comfortable be able to chew on a tail then the tail probably does need to be floor length or with a dramatic curve (that is formed by wire to keep shape).
I’m not sure that you will realistically actually want to put that in your mouth then if it isn’t curved. It’s just a thought about hygiene that I had and wasn’t sure if you had considered yet.