I couldn't raise anyone at 913 371-5373, but did take the blower motor down to NAPA and they matched it with their part number 655-2189. $50 Same blower motor as a 97 Chevy Suburban. The gasket is a little different, but the bolt holes are the same. To install it you need longer screws and some washers. The NAPA one is made in China so I don't know how long it will last, but at least they should be available.
2001 ALPINE 36FDDS