So, I'm re-capping a pair of JBL 4311's, and I'm taking out one of the 2213 woofers, and it's missing one of the bolts! It doesn't even have the spiked nut on the inside of the cabinet. I thought it might have fallen somewhere on the inside, nowhere to be found. The picture is from the other cabinet, this one was loose on the inside and my wife had to stick her arm in the cabinet to hold on to it while I unscrewed the bolt. Where do you think I could find a replacement for one of these? It must have been like this from the factory. They have been unused and un-touched for the past 30 years, and are almost completely stock. They show no signs of ever being worked on.