These are 345 Series Edge Connectors.
Largely all you'll find is what's left in stock, as this has been obsolete format since the late 90's
Therefore it's hard to get the exact sizes needed for the 27, 26, 26, 25 cards that make the SSL 2bus summing, compressor, master fader, pre-post inset, and buffered output.
You have to double the pin count, so a 120, is actually 60 single sided