You can get something similar from McMaster-Carr. They look like the 1/4" NPT to 6mm panel mount type. I purchased a few accidentally cause I thought I might be able to use them in my fuel tank cap. Did not know the 1/4" was going to be a NPT type fitting. Was trying to just get a 1/4" threaded pipe.

http://www.mcmaster.com Check page 141 - 6 mm 1/4" 19/32" 51115K364 6.01


I'll post a picture later of what I received.

JR Gautreaux