You are talking about the new H-Rail? and accessories for that?
New H-Rail clamp accessories require the H-Rail shape rail. There is a market for retrofitting older model PAs to use the H-Rails, so then you could add the accessories. That is not the current priority though, so maybe later in the year once production of the new boats settles down. No pricing is yet available for the accessories. PA17 ... and the accessories for it are not available until later this coming Fall.
Director of Parts and Accessory Sales
Hobie Cat USA