You could try specifying exactly the cable configuration that you'd like and see if they carry something:
Mouser Electronics - Electronic Component Distributor Multi-Conductor Cable
i have some nema 42 slo-syns 8amps 4.25 volts
need to get some heavier shielded cable - 4 or 5 wire maybe
box store around me only have skinny stuff
where can i goto find what i need?
IGUS has the best shielded cable & sell by the foot
Northwire in Eau Claire WI. high flex duty. they may point you to a distributor if you dont need very much.
I found mine at my local electrical supply house.
I have been using Igus. They have a VERY nice cabling selection at reasonable prices. Call Ian Griffin at 800-521-2747(Igriffin@Igus.com). I use 4 cond. 18ga to run the same size motor(CF140-07-04). U can also move up to 16 ga