I have seen "money molder" suggested also. There is such a thing advertized even today, a mold for bar soap, in the form of U.S. currency.

I don't think "moolah" is a good answer. It does indeed mean "money" -- my father used it in conversation -- but it would be redundant, it's not something you think of buying, and you wouldn't buy "a" moolah.

Sure sounds like "mola" on the recording. Sure wish I knew.