An Epic 22 would be the same boat and the ballast system is an add on. You can buy the very late option X22 hard tanks and be able to fill one side or the other. Most X22's have the sack type system. It is not ideal for surfing.
That being said, that boat Breakaway posted is the best choice. Can't beat a well maintained, low hour, inside kept boat like that.
I'd bet that the tanks will work in any Epic, the trunks are very similar.