Well that sucks.

Here is what I would do/easiest way I know.

Remove the oil pump. Follow the oil passage from the broken area to the flat part of the block where the oil pump bolts on.

Drill and tap that hole in the location where the oil pump bolts on for NPT. Plug that hole. You want it air tight. Sink the tapped hole below flush.

Then run a single line static external oil pickup using one of the Milodon billet pumps that comes with the -12 male sticking out.