Original Parts for the INSIDER® are becoming scarce and are no longer being manufactured.
One nice thing about the "Insider" is that all the parts, with the exception of the evaporator, condenser coils, and drain pans are conventional parts that can be purchased at most air conditioning supply stores.
If your needed part is not available locally, call me and tell me what parts you need, and I will try to find them for you. I no longer stock the few parts that you can see here, but am leaving the site up for reference. If you are just tired of messing with it, you might consider replacing it with an Intertherm™ furnace and split system a/c from your local Intertherm™ dealer.