Not sure if the F1 is the same as my F2 but I just put a clear LED integrated tail light on, got it off EBAY, the light is made by clear alternatives. Normal price I think is like $100.00 or so but I picked mine up for $80 after some searching. Very easy to install and looks great! I am gonna try and get some pics of my bike with the new paint in the next couple of days, just chek in the F2 section

 

@micah
it uses the actual brake light bulbs as the blinkers. There are two bulbs in there, when you signal right, just the right bulb will blink; so half of the brake light will flash. Vice-versa for the other way.

@deerslayer
There is no integrated tail light made for the F1; aftermarket stuff really started being made when the F2 was released.

 

Yep thats the one I installed . took no time at all

 

Ok, I wasnt sure how much different the tail lights were on the F1's, was just a thought. Good luck with your light Doomed!