You' ll not find any Tail light, that is fitting perfectly. But with a little work you can use;
Ford MK4 (Escort)

BMW E-30

T2 (VW Bus, second version)

Golf 1

or special types (you should know him!)

(Calibra - not nice but not often)
round ones...

and so on. This and other somewere in this Forum "Technik" -"Alternative Rückleuchten"