Custom-Length Euromap Cables?

Anyone know of a vendor that will sell Euromap (Plastic Molding 32 Pole) cables to spec?
I had a customer that had a need for one 60' long. The one he had was
15'. Since we could not find one (in a hurry), we ended up with a double junction-boxed, butt-spliced cluster-f$#@ that will last about a month before it gives trouble.
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