Turboman
Mab An Gov
Sounds like you have been through the bleed process as comprehensively as possible, might now be time to establish if the IP is in fact rotating, the pump drives off a "skew gear" from the camshaft I think, (I'm not all that familiar with this engine), but @jamesmartin will have seen a lot, and may know if there could be possibility of failure in this area, it could be a failure somewhere in the drive gears or drive tangs on the pump, check that the pump is fully seated in its mounting. Without being there to have a look I can only suggest that if there is a place somewhere on the IP you can witness the pump shaft actually rotating, if its not then there is no way it will push fuel. Which could be the reason the vehicle was sold as a "non runner".
Pump drives off the cam belt.