I have extra 1A1 units that I wanted to use, and couldn't find the mounting for them due to their age.... so... I settled on trying out a small Network Rack mounting unit that was only about $40.00. I had to go through deep surplus for the cross bars, and they were about $35.00/Pair... I needed 2 pairs. once everything was bought, assembled and mounted... I was surprised that everything fit! the only problem.... the units a bit top heavy... but, it works... though I had to improvise to get the KTU's to mount because the original design was for 12-24 screws and the new crossbars use 10-24..... so thing don't totally line up... yet it fits! what do you all think of this?