PINS AND NEEDLES is available for performances. (According to my sources, it was done at Yale University in 2003).
However, I am unable to determine who controls the licensing for it as well.
One suggestion might be to contact the Drama Bookshop in NYC (dramabookshop.com) and purchase a copy of the script--they have EVERYTHING!
Surely, the script will state who the licenser is.
By the way, I saw a production in Boston in the late 1970s--and it is VERY funny--I'd much rather do that show than the dark CRADLE WILL ROCK!
GOOD LUCK with your search! :)
"I say YOU'RE the CUTEST one. No, I say YOU'RE the CUTEST One. And we go on like that from dawn to three."