Follow the write up I put on BC4X4.com for the traction loc. Trust me...you'll like it. I've built a few like this, and it works great.
If you're still looking for 4.56 gears, I have a set for the D35, as well as a rebuild kit that includes all the bearings, races, and seals. I'm in Calgary so I could probably just drop them onto a greyhound for you. PM me if you're interested.
Anything coming from the US is going to be hit with duty when it crosses the border, however the advantage to USPS over UPS is that there are no brokerage fees. I'd look into local sources for gears, there are a few places in Saskatoon and Regina. Performance Parts Distributors, GSS Performance Parts, and probably a few more...