The Mach 460 HU in my '01 is dead, so I need a new one. I've been checking on eBay, and all the ones out of Mustangs are pretty expensive, but there are a few that came out of Explorers/Expeditions that look identical, and have the same rear connections from what I can see - and they are much cheaper. Will these HUs work with the Mach system?

All of them have different part numbers but they all have the middle number - 18C815 - the same, if that matters.