I was asking $200 but haven't had any takers so far so name your price or trade item.
The Saulietis filter wheel is a sturdy machined aluminum system with a very very low profile. It was designed to fit onto the Cookbook CCD camera but can be used on any other CCD camera. One side of the filter wheel has a standard female T-Thread, the other receives a 1.25 inch nosepiece.
The filter wheel has 4 positions with Edmund Scientific optically flat dichroic Cyan, Magenta, Yellow (CMY) filters as well as a clear filter installed. CMY imaging is not much different than RGB - just differnet colors. Most image processing software that can combine RGB can handle CMY and there are plenty of web resources to help you do it. Each filter is 25mm diameter and clicks into place when the wheel is rotated.
Package includes a 2nd wheel assembly ready for you to mount RGB filters or to keep as a spare. I will also include a 62mm red, green, and blue special effects filter. The filter is made in two pieces so it can rotate once it is screwed in (like a photographic polarizing filter). I bought it to use with the Saulietis filter wheel but never completed the mounting effort needed.