Aftermarket wiring kits...
I'm using an American Autowire Power Plus 20 kit. Pretty much the same as the Highway 22 kit. Great wire and such, however none of the black ground wire comes with the kit. The kit alone is around $400-500 depending on number of circuits and such. Then plan to drop another 400-500+ for extra's. Extra wire, clips, weatherpak connectors, all kinds of stuff.
Riddler