So the only off the shelf three port comp which would work for this project is for .40 and has holes which measure .4125", pretty loose for 9mm. Coincidentally 1/4" schedule 40 steel pipe has nearly the same ID/OD of a 9mm TS barrel, so I drilled out the holes in the comp, tapped them, and red loctited in a piece or pipe. I then used a ball end mill bit to re cut the ports (made the first one a little bigger too).
While I was milling out the ports I inadvertently milled some bleeders but it actually turned out pretty well