The Z-Torch is a great update for your old Zippo  or Zippo style carcass. Dual flame starts with the standard style flint wheel, and goes to the default soft flame torch, then with the button below the flint wheel depressed, you get the jet torch.
Pricing is 19 bucks shipped (CONUS). Contact me via my email address on the home page.
Z-Torch Dual Flame Insert