It almost has to be fuel flow blockage somewhere (Unless it's a complete and total IP failure). I'd fly it to an equatorial region where the high ambient temps would liquify even the most stubborn Wendy's pork grease. If the shipping costs are too high, find a really old lady in the neighborhood who keeps her thermostat up at 95 and park it in her living room for a day.

Seriously, if it's a blockage, you could take a container of fresh diesel with a little kero in it, and run it direct to the lift pump with a short length of fuel hose, bypassing your own tank and lines. Unhook your return line and see if you get anything. If not, start backwards, clogged return lines from injectors? Sounds like you would have pulled them to check injectors. Do you get fuel from injector lines themselves if loose from injector? I see you replaced the glow plugs. Do they get current for a while and heat up?

Obviously you might have timing issues, issues related to damage from VO, but I'm inclined to think you should still be able to get it to start, or make noise....
Ben