Seems like it is available, just in the old extension format.
From the noscript site:
> Please be patient: if you feel naked while you're waiting for the "brand new" NoScript, you can still use the "regular" NoScript 5.x (and all the other extensions of yours) on Firefox 52 ESR, which will receive security updates until June 2018. See you soon!
Edit: my statement is incorrect, the noscript page refers to the ESR version of firefox.
> authors suggest to use ESR, which is Extended Support Release, not the latest firefox.