That was the Led Zeppelin DVD, audio produced by Kevin Shirley. I was asked to send him two Empirical Labs Fatso (Full Analog Tape Simulator/Optimizer) signal processors. They are two channel units that can be linked together via RTS patch cables. He already owned one, so by losing him two more be'd have six Chanels of tape solution for the 5.1 surround mix.
I agreed to loan them to him in exchange for a photo with him and Jimmy alongside the effects rack, and a quote to use for PR.
The DVD came out (sounded amazing!) and I call Kevin and say - 'hey, where's the photo and the quote?' He tells me they got so wrapped up in the mix they forgot
I say "okay, send them back to me please" and he says 'can I keep them a little longer? I'm doing a Journey project and I'd like to use them on that'. Being a Journey fan, I agreed he could keep them a little longer.
That was 20 years ago. I sent several letters, called a few times... still have not received them back!
True story.