Here's what I bought and plan to install this winter.
(courtesy of FritoBandito)
The VW latch itself can be bought from here
Glove Box Button - Latch VW Bug 1952 to 1967
Then here's where you buy the pull.
VW Glove Box Pull Tab 1953-1967 Beetle, Bug
I have the key-type in mine and prefer the push-button style.
(If you can stand to put VW parts on your SPF.
)