A few years ago, I bought a kit for mine that was missing the lever used what I needed and resold the rest of the kit to someone that didn't need the lever but needed the rest of the kit for a discounted price. So, both of us got what we needed.
A suggestion out of left field items you would use on your body to fight a fungal infection, Tea tree oil, Vics vapor rub I think Epson salts a google search would be where I would start.
I had one just like that. It was my grandfathers; I was using it one day to air up a tire and it blew the bottom out of it. Even had some of the neighbors come out wondering what the explosion was. His was most likely purchased in 1963.
Here is a stant catalog you may find helpful http://bd8ba3c866c8cbc330ab-7b26c6f3e01bf511d4da3315c66902d6.r6.cf1.rackcdn.com/Stant_12270_Pressure_Tester_Adapters.pdf
I own a battery charger that was stolen from me in a burglary, and it was recovered and the lady that bought it from the kid that stole it had scratched here SS# in the top of it. I still have it and that was in the early 90s.