I bought some sockets from Amazon. Of course they were from that giant Asian country. They measure just a smidgen over 5/8". I still have 4 left. Send me PM. I used two for my parking lights on my '51 and the bulbs were tight, but they fit in the housing.

Kevin
1951 Chevy 3100 work truck
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Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.