If you're happy with the Perfect Push-up, the same guy also designed the Perfect Pullup, too. Here's the link.

I think I know the pullup bar your friend is referring to on the infomercials. It doesn't even need to be screwed into anything but sort of "hooks" over the top of a door frame and is held in place by your body weight, but I have my doubts about how well it works long-term. Good luck with your fitness plan!