I pondered doing this with either a normal or a giant Lumicon finder scope (80mm) - these accept 1.25" eye pieces so adding a meade DSI = easy!
Mind you this give you a only a 300mm focal length system (maybe use a 2x barlow?) with 3.8 degree field of view. I was tossing this up for remote viewing to check where I was pointing with a second CCD until I nailed the pointing problems.
http://www.lumicon.com/astronomy-acc...Finder+Systems