You can also buy a 9 inch Ford to bolt right in. I think it is more of a dirt car thing so you could probably look in one of the stock car magazines for a supplier. The early Bronco rear end is a nice width for those cars if you like to do your own mods.
If you live in an area where they race stock cars it can be hard to find a metric Monte with a rear axle or upper A arm left on it.lol