One of the changes I've made to my airbrush station is I like to use 3 airbrushes at the same time. I picked up everything at Lowes. Quick disconnects makes it east to swap out brushes without using wrenches and you can unplug one and still use the compressor. I needed a 3/8 to 1/4" reducing bushing for my connection to my compressor. Use teflon tape at all of the threaded connections.
There are larger manifolds if you wanted to use more than 3 airbrushes. Had to prove the concept, may change it around a little now that it works.
Here are the links to the materials that I used.
Shop Kobalt 1/4-in Female 3-Way Manifold at Lowes.com
Shop Kobalt 1/4-in Brass Male Universal Coupler at Lowes.com
Shop Kobalt 1/4-in Brass Male Plug at Lowes.com
Shop Watts 3/8" x 1/4" Lead Free Brass Pipe Hex Bushing at Lowes.com
Threaded Mode