ORIGINAL: 46u
That gear will work but the drive cup will not as it is to small and that gear does not have the hole through it for the setscrew with the long pin. The only place I know of getting the alloy diff housings is ebay and sorry to say the only one I know that makes them is GPM. Two things I do not like about GPM is their parts are made from cast not billet and I have had problems with their stuff. This was a few years ago and hopefully things have improved. I guess I am going to have to bit the bullet and try them anyhow as the only other alterative is sell it.
http://cgi.ebay.com/ws/eBayISAPI.dll...1996&rd=1&rd=1
What I'll do is drill a hole through it and then I should be able to fit the correct drive cup and set screw on it. We'll see how that goes - if no success, I guess I'm gonna have to buy another diff set.