kynar & teflon
kynar is also known generically as PVDF in some selector tables. Harder than PVC to knick or burn. electronicsurplus.com had some a couple of weeks ago in the 26 ga that is not used for microelectronic wirewrap. They also had some teflon insulated shielded twisted pair in small gauge, that I bought some of to run inputs from RCA jacks past a cheap, non-insulated power transformer. I like teflon insulation bacause if you don't do this a lot, and are waving your soldering iron around while looking for your connection, you don't burn another wire. Teflon, PFTE is extrememly expensive in the primary market ($60 a hundred feet for ROP compliant new stock) but esurplus has got some 18 teflon hookup wire in various colors. Their shipping is $10, a little pricey over 250 miles, and their minimum is $15. Good luck.