4Runner Vacuum Switching Valve-4wd Problem

I had my 96 (SR5 v6 manual transmission) 4runner diagnosed at the
dealer today. THey said the Vacuum switching valve was no longer
working and thats the reason my 4w4 will not engage. The switch is
located in the engine bay just below the fuse box. The price of the
new part is $650CDN from Toyota. Does anyone have a part number for
this? I live in Hamilton Ontario....anyone know of a auto wreckers with
some 4runners? Any help would be appreciated especially since winter
is here and I like the 4wd for safety. Please mail me directly as well
[email]chadg42@hotmail.com[/email]
thanks,
Chad