I got this in a lot of stuff at a estate sale..it was brand new in the box but the gasket is old and dry..is there anyplace that may sell these tips? Or what can I do to it to use it? It also has the metal hanger with it. It is basically an old glass milk jug shape. The company is called Docktor, I can't find any record of them..someone paid $28 for this in 1987!!