Namasthe Sri Rajamji,
The Ist page of the work which I have attached with my mail is from
"Srividya Ratnaakara".As the name suggests the book contains a lot
about SV worship.
I understand that you wish to know about SV Nyaasaas only though there
are different nyaasaas for different deities.
I am attaching it's title page and some pages of index so that you can
know if it is the work you are seeking as well as availability of the
book.The book was first published in 1972 and its revised edition has
been published in 2012 where most of the printing and other errors
have been rectified.You can have the book from the publisher image of
which is also attached.
If you wish to know about the importance of Mahashodhanyaasa please
read about Sri Bhaskara Rai Makhin's life the great SV upaasaka.Many
of the learned scholars in this forum have also hinted about the
nyaasa in the foregoing discussion as well as about various books to
be referred.
Jai Sri lalithe
Pandey