Does anyone know who was the previous owner of my car?

But probably not against their policy for you to provide them your information for them to pass on to the previous owner to contact you if he wants to. I've done that before with good results.
I asked them to please do that but the reply I received was non commmital. So I sent another email to the owner of the company asking to simply pass my informaiton on to the previous owner saying that I wanted to buy the remaining A/C unit parts if they were still available. We'll see if I get a response.