Connectors and wire for splicing

The wiring to the altenator and the temp sender unit is frayed and brittle on the 69 Dart GTS. I can splice in back near the firewall, but I need good condition wire and connectors for about 2 to 3 feet. No luck on web, so I figure possibly scrap harness is only option. Total of 3 with connections. Two to alternator and one to the temp sender. One of the two to the alternator is I am guessing 10 guage.

Thx

Spinman