This connector is part of the Champ 050 series II manufactured by TE Connectivity (Tyco Electronics, formerly AMP). Digikey stocks what appears to be a mating connector, P/N 5175677-9-ND for about $16 in quantities of one. From what I can tell this is an IDC (insulation displacement connector) that should crimp onto a ribbon cable having the .050" or 1.27mm pitch. I don't know if the ribbon cable would cause problems with cross-talk, but it might be worth a try given the cost of cables from Galil.
What appears to be a mating ribbon cable is P/N MB100G-5-ND for $18.54 for 5 foot length or $34.44 for 10 foot length. So a 5 foot cable with 100 pin connectors on each end could be made for about $50.