Does anyone know if there is an example compliance program that I could give to an MSB who clearly does not understand what one should look like?

There's a whole section for merchants on msb.gov. I would steer the customer there.

Yup. I go there all the time. We go there often in our shop.

Has anyone found guidance for Hispanic owners of MSBs? From what I've found on msb.gov, there are handouts in Spanish for employees of MSBs, but not instructions, registration information, etc.