Actually if you buy Odyssey and you go to your account -> under refills, an option does pop up for Odyssey ($19.95)
Oh sweet!!! I didn't know that. I can finally get the proper fitting size now without having to buy a whole new ring. Thanks guys!kakegurui is correct. This isn't really a "refill" per se, but you can buy new gimmick packs at the discounted price should you ever need to.
// L
And if you mess up/lose the nongimmick ring where could you get another one? Thank you for your help.