I have a 1938 frigidaire refrigerator that I am restoring. The problem is it has a leakand it takes R-114
refrigerant and it is $925.00 for a 30 lb bottle ,and I only need 20 ounces. It has a 1/11hp compressor . there is no fan on the evaporater or condensor. I would like to change out the compressor and use a cheaper refrigerant. But I don't know where to start on this. So I found this web site and it said refrigeration engineer, so where better to ask.

I could sure use some help. I have pics if needed
Thanks Todd Gallamore