Tim [and alltruck72] - those original style teardrop lights [1st you link, like KD 517's] are very scarce new - Arrow Safety had similar until about a year ago that I think were by Grote, but generally they're now an e-bay thing -
similar ones can be found at
Tail Light King, but good used ones go pretty fast .... used ones with stainless covers are more likely to be restorable than those with plain steel covers
Bill