Hi Mike
We did offer seats for the RV-10, and had planned to offer a full interior. I've put more detailed information about it in our FAQ section:
http://www.classicaerodesigns.com/we...7FA117CF4D082C
Our current focus is to offer comprehensive interior options for all of the aircraft that we currently make products for (the list you quoted above). In other words, seats, carpet, side panels, and various accessories. These are prioritized by which items our customers indicate are most important to them. Right now new RV-14 and RV-8 products top the list.
Based on our previous experience a complete RV-10 interior option would represent the highest upfront cost in product development, and due to some other products already available, the lowest chance to recoup that cost in a reasonable time frame. I wish I could offer every product that customers show interest in

On the plus side for RV-10 builders, there are some pretty nice options our there.
btw, cool pedal plane!