[Amps] Coax needed

[ANTHONY JAPHA]

The directional coupler I'm building calls for a couple of short pieces of RG-303, apparently an obsolete teflon-insulated coax.  I haven't been able to find any of it.  I need only about 6 inches (yes, inches!) of it.  It is used to carry the power--just 100 watts in this application--through the toroid cores in the pickup unit.  The coax simply runs through the middle of the toroids, which have a winding on them.  The cores are small T68-2 types, so the coax must have a pretty small diameter.  RG-58 is a tight fit.

Anyone have 6" of the RG-303 lying around to sell; or any suggestions for a substitute coax?

Tnx and 73,
Tony, N2UN