RSCF filings state they have multiple companies that manufacture the freezers for them. Not knowing how much they cost it's hard to estimate how many units have been sold. I don't imagine it's too difficult to make them. Sheet stainless steel, hinges, valves, piping. All should be standard stuff
"We have found a number of companies that can manufacture products to our specification"
It's nice to have a lot of horsepower in the engine room but you need some in the wheelhouse too.
