This is Packard Bell FastMedia Remote. It is New Old Stock- brand new, but a few years old. I bought it before I really decided on my project, and now that I've built my carputer, I am going with a USB RF remote instead.
$10 Shipped. No drivers, but I'm sure they are on the internet.
Also, I have a serial extension cable, something like 18 or 20 feet or something- it reaches from the trunk of my car to my glovebox with extra left over.