Hi, Daniel from Keysight here. What specifically are you looking for? Basically, are you wanting an MSO ribbon cable + flying leads? I'd go looking on ebay, etc., for an old HP logic analyzer with cables. Our 40 pin connector has kept the same footprint over the years.
Also, I'm partial to the new cable over the old ones. It's a lot easier to use just a few channels and wrap the other unused channels out of the way.