Coplite 
Model 804 Rear Deck Light Kit
Kit includes: 
Your choice of (1) red, amber 
H3 Halogen bulb with black housing and glass lens. 
(1) rear seat bracket 
(1) bolt and nut 
Available in Red and Amber (not shown). 
Amber version is an additional $10
This bracket mounts to the existing  rear seat bolts.
All components are new old stock.
Rear light now includes a standard single flasher
 This flasher will flash the rear light on and off. Flasher brand may vary from photo.