Although it is 2 year old query, I am answering this thinking it will be useful to others. We bought same Ceracon/greacon tiles from Buildmart Bommanahalli, ranging from 45psft/65and 150psft(pooja room ultra thin 6mm wall tiles). After seeing so many shops in around whitefield/bommanahalli, we found...

Check this link http://www.karunadu.gov.in/karigr/ or http://www.karunadu.gov.in/karigr/Banga ... tValue.rar

Some one already benefited by direct recharging through casing pipe. Please check following link
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Is this site still available for sale?