Finding Affiliate Program?

Hey all, recently I received an affiliate sales email. The product was actually something I found interesting.

I tried to find the actual affiliate program thinking it might be something I might try and promote. I was unable to find the company.

So, this leads to my question. What is the best way to find the affiliate company behind a product.

I searched "product" affiliate etc. but was unable to find it that way.

I appreciate any thoughts.

Did you try to reply to the affiliate email? That would be a good place to start, but if the program can't be found, I'd stay away and go with a competitor who offered the same product.