I have the Craftsman (Kastar/Lang) 40 piece rethreader kit, but I find that often Im in the need for rethreaders that are #6,#8, and #10 SAE. Do these exist???
Taps should be available at any decent hardware store. As far as thread chasers buy one of those combination wire crimper/stripper tools and many of them have machine screw cutters that are threaded on one side if the cutter. I use those as chasers often.