I have my old BBF jetpack harness up for sale. it is in excellent shape with no damage. Minimal scratches on the horizontal bar from putting on/taking off the pack. I had replaced the high end military style shoulder strap adjusters with parachute clips (because of my moobs, they would slide to the side and were visible and uncomfortable) but i will include the original adjusters as well. For those that do not know, this harness was one of the ones to get a few years back and the quality is likely better than the harness they actually used in the movie. It is full stainless steel, welded, not riveted together (aside form the horizontal bar) and all strapping is already sewn on.
You will need a divers buckle, as i only have my 1 real deal which im not giving up lol. Full Metal fett makes an outstanding replica, or you can still find the real ones on e-bay from time to time.
$255.00 plus shipping.
This thing is a monster to take pics of with all the straps lol.