The Signal-Stat 10-53 turn signal flasher is available under various names and numbers.
Signal-Stat is a big brand of commercial electric parts -- emergency vehicle lights and such.
A decent auto parts store should be able to get one, either from Signal-Stat or by
cross referencing the number to another supplier.
For example, this part is used in some Volvo large trucks. When I saw/heard it in a truck
I drove, I went to the Volvo Truck dealer to buy my next one. Their number is 02-7112828.
On the Volvo box there is also a cross reference that seems to be to Dietz 10-530. Dietz
is an other brand of electrical parts.
Oh, and there are two SAE numbers on the Signal-Stat label: SAE J-590 & J-945
This flasher does NOT plug in where the regular little one goes. You connect this one
with two wires from the original terminals. The unit is about 2 1/2 inches square and
1 1/2 inch thick. And it needs to be grounded. It has a mounting bracket on it.
You can open it up and adjust the speed of the blinking if you wish.
I love the sound of this thing. An honest, clean, metallic click that cuts thru noise
Yes, I am capable of getting this exited over a turn signal blinker. Sad, isn't it.