Looking for the ultimate makhani sauce recipe

I seriously believe Makhani sauce is the best stuff you can eat on this planet. But it is incredibly hard to make. At least, that’s been my impression to date. I spent an afternoon constructing something verbatum from some website, and it sucked so bad I tossed the entire batch.

So I’m done trying to make it. Anyone know where I can buy a TUB of the stuff??