You can download the PDF copy of the Sri Vaishnava Shraddha Prayoga completely free of cost via the link below:
Obtain the book "Sri Vaishnava Shraddha Prayoga" published by Ubhaya Vedanta Pravartana Sabha (Kanchipuram) or the Sri Ramanuja Mission Trust (PDF copies sometimes available for scholars). Alternatively, request the Prayoga Patam (ritual booklet) from the Sri Rangam Srimad Andavan Ashrama . sri vaishnava shraddha prayoga Free