I was doing some reverse flyes, push-ups and rows in PT last week. Now, it totally flared up my thoracic outlet and I've got numbness down the other arm too but I really liked it when I was doing it. I don't think theirs was branded, and they just had it looped around the top of their leg press rack.

It looks like it would be pretty easy to make one from some old motorcycle tie-downs and some PVC pipe for handles. The only issue would be anchoring, which I was wondering about driving a J-hook into a garage roof beam or a ceiling joist in the basement.