I needed an adapter today for a 10ml Syringe and for a 5cc 15g Chipquick Solder paste syringe. These both seemed to work out well.
I drilled out the hole to get a tight fit on 3/16 brass tubing as the air connection to the 982A. I doubt a 3d printed connection that small would provide a secure mount without breaking off.
You could drill the hole to you tubing size and just glue it in with CA as the pressure I use is seldom above 20psi.
They use 1/16 o-rings. The Chipquick one has a 3/8x1/2 and the 10ml syringe uses a 1/2x5/8.