[6pack] rear light sockets

[Bob]

Back when I was restoring my 72 in 2008 there was a vendor that sold 
replacement light sockets for the rear lights. As everyone knows the 
sockets supplied are not the best.

I was just wondering if they are available from any of the US suppliers.

I had to replace 2 bulbs today and I am thinking that maybe the reason 
they failed is the socket just does not hold the bulb that tight. I 
would like to replace the sockets with the upgraded version the next 
time I have to replace a bulb.

Thanks,

Bob