Firstly thank you Dominik for backing up GRETIL.

Secondly, in Sw. Vimalananda's english translation of the Mahānārāyaṇa upaniṣad, after verses 23 thru 33 which list gayatri mantras to various deities, he makes the comment: Of these twelve gayatris given above only six are accepted by Sayana and five by Bhattabhaskara.

I was able to find on archive.org the edition of the Atharva veda recension by Jacobs  with the Dipika of  Narayana but not any editions with Sayana's or Bhattabhaskara's commentaries.  

Was this text published with these commentaries and if so are they online somewhere..

Thanks,

Harry Spier