1939 OIL Gauge

[buick4547 0]

I'm going to take a shot here.  Does anyone have a line on the where abouts of a new old stock oil gauge for my 1939  special.  It is giving me some whacky readings.  It reads at just a hair above zero when the engine is running at optimum temperature.  I have tested the actual  oil pressure by hooking up  an auxiliary gauge to it and it shows the engine running at about 45 pounds at normal use, which according to the shop manual, is about right.  I know that I could take the gauge out to have it reconditioned, and I may, but I thought I'd look for a NOS first.

 

Thanks.