Hell, he can go to HD, pick up a bench top drill press (cheap ), get a spiral plug cutter (maybe not so cheap )and bang out as many ( or few ) as he needs.
you can get a SPC anywhere from 1/4 to 3-1/2" dia
1978 Tayana 37
Freedom comes when youíre ready to sail away. True freedom comes when you donít have to return
Cut off from the land that bore us, betrayed by the land we find, where the brightest have gone before us and the dullest remain behind, .......but stand to your glasses, steady,.......tis all we have left to prize, raise a cup to the dead already, hurrah for the next that dies