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.