Swamin,
You can get the 4000 divya prabhandham sandhai cds from Kaari Maaran Kalai Kapagam trust Triplicane.
Here is the address:
1, Car Street
Triplicane
Chennai - 600 005.
Tamil Nadu, India.
Ph: 044 2844 0009
I am not sure of the Sri Swamy Desikar Stotrams.
Adiyen Srinivasa Dasan