From my experience, getting new LUV parts like those will be next to impossible. What I have been doing is matching parts such as vacuum lines, fittings, etc, to generic parts at the auto parts stores. There are so many different parts that so far I have been able to get practically everything I need. Of course there will be those parts you can't match up very well, so you may have to get one that requires a bit of modifying to work. As far as the wire harness, looking into a new aftermarket one from EZ Wire (
http://www.ezwiring.com/ ) would be your best bet. You can increase your fuse box capacity and have much better wiring with everthing labled to where it fits. The price is much better than Painless wiring. As far as other parts that you need but can't find new, ask on this site. The LUV truckers on here may be able to help you out.
Rick