The CJ is a recognized class in AMYA. They put it under the "J" group. As for the J, you can get laser cut frames for the 1/16 size. I don't recall the company or just how many boats they offer but they have quite a few. I think they also claim they'll cut to any scale. So you could probably get a good start there.
Wish I could recall the company and their web site but I probably deleted it when cancer changed my modeling capabilities and priorities.