These spray units are made by a company named Preval. I have the P/N for what they call the power unit (gas cylinder) 268-1 but I see no P/N on the glass jar container. http://www.prevalspraygun.com/
I have seen them at Home Depot/Lowes and you may find them in parts houses perhaps.


Bruce
Old Toy: Ol' Betsy stock 59 Apache SB Stepside (Gone but not Forgotten)
New Toy: 1962 Impala SS Coupe
The Driver: 1990 Toyota truck