Mixed.

Bad news is that the hose spigot bush was completely gone from the manifold cooler, not just cracked or loose.
Good news is that the spigot itself was recovered in good nick from the hose that leads to the exhaust elbow and that there were no other blockages or holes found..
Bad news is that getting the manifold section off requires many hours WD40 soaking on the stud nuts before they will shift without potentially stud shearing violence plus removing a 6" exhaust hose and a hefty lump of turbocharger. Plus, as my engines lie over to port, its the port one and harder to get at.
Good news is that a friend will weld up a new spigot fitting for a bottle of his favourite.
Good news is that the spigot, reversed, was a drive fit into the hole left in the manifold, and with plumber's putty a temporary fix with water circuit has been achieved. How long that will last remains to be seen. May be some time at river tickover, may be very little time indeed at higher power output.