On corvette vacuum headlamp hose bundles and on a few places on the wire harness there is a tape used to bundle things together which appears on the adhesive side like friction tape but has a black smooth front surface, (like harness wrap or electrical tape but this black smooth front is only a fraction of the thickness of electrical tape or harness wrap.) (not to be confused with the fiberglass filament tape used at the vacuum "T's".)
NO ONE ON THE NCRS boards had found a suitable replacement as of last year.
I replaced a couple of sections and used friction tape of the correct width combined with 1/2 mil black plastic cut to the correct width as the tape .
Does this appear to be the same type of tape as on the sending unit wire?