They may not want to do the A/C replacement on a 97 Roadtrek because it is not using the A/C that more recent Roadtreks have - the Dometic Kool Cat - heat pump and A/C. Most who replace the older Roadtrek air conditioners do so with a small home unit that fits - which is what the links in other responses here talk about. These A/Cs have to be shopped to find the correct one and then installed. If you had the A/C you may convince them to do the job for you. Since you are not dealing with a specific Roadtrek part, any RV shop may be able to do this job for you - but I am guessing all would want you to supply the A/C. As I recall, at one time Home Depot sold an A/C that fit. Of course, these won't be in the stores for several months.