No factory option I'm aware of for trucks. Anything out there would be aftermarket. You can find original aftermarket hazard flasher setups on ebay, but they tend to be very expensive. Most of them also do not list as being compatible with trucks before 1960. I don't recall the exact sit, but I did find one that showed how to make your own, if you're not adverse to doing some fabrication.
Last edited by LONGBOX55; 01/22/2015 9:01 PM.