Stop in for a cup of coffee

A Sanden A/C compressor mounting plate that is similar to the factory plate that takes 2 belts like the factory ones. My friend modified a factory plate to fit the Sanden compressor. He did both a SB and a BB plate. Everything out there such as Classic and Vintage only uses one belt. I plan on using his setup when I do my a/c.
Perfect. I would think he would need a example or drawings. What do you think they are worth? I have no idea what his cost will be.