Your mailbox is full. To answer your question about diff and trans fluids:

I live in Canada. One of the local forum members runs an automotive supply company and he carries Amsoil and some Redline products. Your best bet is to try to find a motorsports tuning shop. Perhaps do some shopping online...might be able to get a better price, just have to wait a couple of days due to shipping. When I was visiting my brother in Seattle, I tried Autozone, Pep Boys, O'Reilly's (Schuck's), and none of them carried the "good" stuff.