Brown insulation paper and orange cellotape



In doing repair on a laptop, I would feel better about taping down a
couple of flat nylon connectors with some of that thin orange cellotape
that a few of the other connectors inside use.

Also, I remember thin sturdy brown paper used as insulating *** in old
radios in the sixties and need some of this for another repair.

My local electronics supplier was no help on either but mentioned blue
fish paper as an alternate for the insulating.

I would like something sturdy thin and nonconductive such as the old
school stuff and a decent tape that won't ooze or breakdown down like
Scotch Magic tape. Regular packing tape varies in quality and I need
something thin but strong.

Any ideas on these two?

Thanks a bunch--
.