71-72 dodge demon tail light lenses

Nick,
this wont come as good news, but demon tail lights are becoming near impossible to find..or at least ones that are not torn up. The guys cloning out of dart sports and the like, have gobbled them all up. No one restores them, no one repops them. (ie: we're screwed)
like you, Ive been searching to no avail. My car came with a spare single unit, which is in bad shape, but has enough parts to make my two other marginal ones work, but with alot of effort.
If you find a source for new/good used, please let me know.