I think the concept of using this motor is great, but agree with JPG's view above that I would be highly concerned about after sales support. I've also avoided the PowerPro upgrade for much the same reason after seeing these threads of non-response, months to get fixed, etc.
One option that springs to mind is an open source hardware (and software if the OEM unit is programmable) project. Detailed CAD drawings and files that could be used to manually machine or CNC necessary highly unique parts (motor mounts), specifications and suggested sources for pulleys, bearings, and etc., modification templates, instructions, and so forth. Any person or company could offer parts for sale as long as they adhered to the specs, and if deviating from the specs would need to release those new drawings/files back to the project. But owners could take the same freely available specs to a local machine shop and have the same parts made locally. Many of the 3D printers that come in a hard core kit format were developed somewhat this fashion and even some of the more commercial offerings still have some hardware and/or software components that are based on open source.
Mark V/510, Mark V/500 with parts for 510 upgrade, bandsaw, jointer, belt sander, DC3300 w/1 micron bag
Home designed and built CNC router, another CNC router
Way too much other stuff and not enough space