Perhaps with these smart telescopes a swap out for a mono sensor might be feasible ? I used to do this kind microsurgery on webcams back in the day but my eyes and hands are not up to that now and I expect the pins are much closely spaced. If it uses a separate off the shelf camera module it might be possible though if there is a mono version. (Plus a firmware hack to get at the raw image before debayering)
With the Unistellar, being an open tube you can get in to put filters (or even a diffraction grating) in front of the camera