Ahhh, the LAV III. At the moment I've got a LAV 25 kit and a Stryker kit from Empress and I'm taking the Stryker chassis and putting the LAV 25 turret on it ... then adding some platicard details. But, I may just throw in the towel and get my 3D guy to model one up for me and print via Shapeways since the G-Wagen came out so good.
You let me know when the LAV-III is available. It's the Unicorn of the Canadians line.
Battle Rattle? has the Canadian minis, and I was thinking of the same thing - Empress. I emailed them about it.
I did the same thing in 6mm, and it was a pain. Then GHQ finally did a full Canadians line, and yay!
Are you going to cast your G-wagen and LAV-III? And you should consider the up armoured slat package for the 2A6M