Dear Prof. Prasad,

It is not clear to me what you are asking for.  If there are printed editions of the Śūnya Purāṇa (Pūrṇana?) then please give the bibliographical details.  Or are you seeking manuscripts?  In which case, have you consulted the most recently published volumes of the New Catalogus Catalogorum?  Works beginning with "Śūnya-" are in volume 35, which was published earlier this year.

Sincerely,

Dominik Wujastyk