Creamsicles have a very wide range of colours. The Corn described could very easily be a Creamsicle and not a Reverse Okeetee. If you were sold a snake as a hybrid, then you should really consider it as such. There's no way of contradicting the seller and proving that it's a pure Corn - looks alone won't do it.
So for starters, please make sure that any offspring are sold with reference to hybrid parentage.
Having said that, I agree with the previous poster - Creamsicles have a healthy set of Amel Corn genes, so find either an Amel Corn or another Creamsicle.
If you can find a different "shade" of Creamsicle, you could end up with some very attractive hatchlings with a nice variety of orangy shades. Not everyone is a Pure Corn Nerd like me (!), and there's a solid market for good-looking Creamsicles.