Coleman Pump Halkey Roberts (HR) Adapter

I bought my daughter a gymnastics air mattress for Christmas, and it did not come with a pump. I assumed I could use a standard nozzle to inflate it, but it actually had a cool inflation port that kept air from coming out after you remove the pump nozzle. After a bit of research, I found out that it is a Halkey Roberts valve, commonly used on stand up paddle boards. I found an adapter on Thingiverse that would allow me to hook up a compressor (I have one, but this Air Track requires a pretty l