Where can I get the index for Yabia Omer ? I cant find it anywhere since its out of print. Any ideas ?
You may want to hold out and see if they update it with the Teshuvot from vol. 11, but it's available in Eretz Yisrael seemingly. http://www.sefer.org.il/Product/41188/share
It is [widely] available, see here on Zbermanbooks.
Updated information for those who are still looking. Just reprinted last year.