I am trying to replace the tail lights on my 72 ambassador and have found it very hard to find a replacement for the 4" round. The entire light needs to be replaced because it has rusted beyond help

So I have been looking at all my options and was wondering if anyone has used these led lights?
http://www.florawrecker.com/cgi-bin/...y_Code=LEDSTOP I think I may be able to reuse the lamp housing if I do some work on them but I was wonderong if anyone has used these lights in the original housing?
Did that make any sense??