A couple of thoughts,
The hole if it's dead center is supplied from the factory.
I once lost a freshly rebuilt 289 smallblock when a small piece of metal got sucked in and locked up the oil pump ( End of a snap ring broke off from the Crane Roller Rocker arm).
Since then I've removed the factory screen and wrapped metal window screen materiel around the base, folding it up and securing it with a hose clamp. Thousands of miles and no more problems.
Point being, if the tube is structurally ok, you can remove the screen and repair it if new pick up tubes are scarce...
DannyG