Thanks for spoon feeding me here guys. Having read all of that now here is what to do (for any others now or at a later date following along).

Go to car-part.com

Search for a "carrier" to fit a 79-82 mazda 626

I got about 25 results and a few of them list 3.63 in the description. Prices range from $100-$300

I will call a few in a couple of weeks once I have some money laying around again and see if they will remove just the ring and pinion gears to ship to me (I am in England and the shipping is going to eat me alive otherwise) But for all of you stateside this looks like a very nice deal.