Master Airbrush Heavy Duty Diaphragm Mini Pressure Regulator with Gauge and Water Trap Filter - Moisture Trap for Airbrush Air Compressor with Precision Control and Easy Drain Valve

You are better off replacing the regulator/moisture trap to something better since finding a replacement part probably won’t be easy and if you do find a replacement part it probably isn’t worth the cost.I just replaced mine with this one but the old moisture trap looks almost identical to yours. If you want you can DM me and we can see if the parts from my old one (I was just gonna toss it) will fit yours.The pressure gauge and main body are pretty mangled since it was glued onto the compressor but I removed the moisture trap parts prior to attempting to remove the unit so they are in good condition.Hope this helps