Although not a cheap alternative, I purchased the replacement 7-pin flasher relay that is made for LED's. This stock OEM flasher also is the relay for the fuel pump and another function that I can not remember. At any rate, they are available online anywhere from $17 to $40. It functions just like the OEM relay but is built to handle LED's and return the function to stock flash rate. I do not like cutting into my harness and so opted for the cleaner, slightly more expensive plug and play relay. I swapped all incandescents with dual filament red LED's in the rear (turn signals are now turn, park and brake) and AO switchbacks in the front. Not one problem with the flasher replacement since April.
FALQN