Last summer I decided to fix my hazard lights. My car is a '66 town Landau (has overhead console with lighted, rectangular hazard switch). The problem was the two relays in the trunk. Both coils were rusted and open. I was going to buy the original style but the old drawn can types were too costly. My solution works well and uses three modern (inexpensive and very popular) relays in place of the original two. If you can solder and crimp, this solution works well and should a relay die in the future, they are about $4.00 a relay so you can keep a spare in the car. I attempted to attach a schematic (pdf) which shows how I used the three relays in place of the original two. Also, if you buy the new style relays, get the sockets with the attached wire harnesses too. This makes replacement easy should you need to replace one "down the road". Then you just solder the car's original harnesses to harnesses of the relay sockets because you need the orignal connectors.
The relays I used are common 5 pin, 40A style easily found on online auction sites or any auto parts store. These are typically used to control electric fans or air conditioning components. Good luck and keep in mind you can still get a defective modern relay so be careful.
I also used the same style
relay for my brake lights - the one that sits between the sequential relay and the cam switch on the rubber pad - Consolidation Rules.