Help finding vendor for specialty wire

[buckidge]

I'm looking for a specialty wire to make an extension cable for an instrument at the lab. Where can I find a vendor that will sell me this type of wire (or similar):

7 conductors total
5 conductors, 28G + sub assembly (carry low voltage DC)
95% braided shield over all wire
Sub assembly:
**2 conductors, 28G twisted pair (carry ~400V @ 25kHz)
**95% braided shield over sub assembly

I can't find anyone who makes a shielded cable inside another shielded cable. Help in finding a vendor that has this type of product off-the-shelf would be appreciated!

 

[MATLABdude]

Welcome to PhysicsForums!

I can't make a specific recommendation, but maybe something like (shielded) Cat-5E or Cat-6? However, I think most of these tend to be foil shielded, instead of braid shielded (if that makes a difference for your application).

Alternately, perhaps some metal braided sleeving to go over your own custom wire bundle?
http://cableorganizer.com/metal-braided-sleeving/