I've been building my CNC router table for a little over a year now and I'm nearly there all I have to do is build my vacuum table.
I have designed my own vacuum manifold using everyday plumbing parts.
Here it is made from 6 x Compression Appliance Tee Brass ¾" x ¾" x 15mm BSP for washing machines
6 x Brass Sockets ¾" F x F connectors
1 x QPL Manifold End Cap (Female)
1 x 3/4" x 12mm straight connector
1 x 12mm to 1/4" hose connector for air line

Here's photo for your interest.
Attachment 257214