[davemc]

grandbrass lamp parts (grandbrass.com) sells many types of cloth covered wire with individual cloth covered inner conductors.  For example: WI18POBR-C Description: 18/2 BROWN RAYON FLAT BRAIDED CLOTH COVERED WIRE WITH TWO CONDUCTORS SOLD BY THE FOOT OR ON A 250FT. ROLL. (This is an Antique Replica Wire and is not U.L. Rated) Fits through 1/8 IPS nipple.  But it is PRICY!  $.95 per foot.  They also have the old style black twisted pair wire often seen on late 20's sets, and the old style AC plugs also.