Flasher Unit built to a price ?

[tommymck_imp]

The thing with flashers is that you don't want to focus the light. This is so that it is visible to others from as wide an angle as possible.

If you use a reflector to focus the light on flashers, by definition you are making them less visible to the side. And this is more of an issue for the front flashers because they are of most use to oncoming drivers who will be off to the side of you.