Looking for a wax injector

Hello all. I am looking to buy a wax injector. Happy to find a used
one if possible. I would like one similar to the KERR Injectomatic
II. I want one that does not require an air compressor. I also
would like it to be able to be pressurized. I want to be able to
keep both hands on my molds as well, when injecting. Not like those
pump-while-you-hold models. If anyone is has an extra lying around
and is interested in selling, please let me know. Thanks!!

Tavia Fromm