No known open contract between the Saudi Arabians and Pakistan because obviously that would cause instant world protesting and UN sanctions. But as I understand it if the Saudi Arabians want nuclear weapons then all they have to do is ask the Pakistanis. Not sure where I read that but I would have to start searching for the article and that is not something I feel like putting lots of time on right now. Possibly was FP or some other world studies magazine.
We return to the absurdity of any nation giving away nuclear weapons.
Using that concept as the premise for anything is pure folly.
Yeh, sure, the AQ Khan network gave away technical information & even used centrifuges, but they didn't give away any nuclear weapons.