Has anyone found decent tail light plug replacements? My original ones on my 1967 Cutlass Supreme broke a few years ago and every replacement I find on the internet doesn't match. When installed they fall out of the socket. Here is a link to the one I ordered which didn't work.

https://www.summitracing.com/parts/r...AaAtrgEALw_wcB

I have a buddy with a '66 Skylark that has run into the same issue.

 

I also have one like that one you posted and it falls out of the socket from time to time. I just ordered a new one yesterday and I will see how it holds up.
https://www.ebay.com/itm/Chevy-GM-Du....c100667.m2042

 

I replaced mine with these, they work well but are a bit pricey. Also used some liquid tape when installing to seal them up.

https://www.ronfrancis.com/prodinfo.asp?number=RR%2D33

 

Those make it rough on a 67 upper tail light as you'd have to take the whole assy apart to change a lamp.