Found one more source of high density thermocol, depron and coroplast ( MUMBAI)
ABDULLATIF HABIBBBHOY & SONS
196, Abdul Rehman Street, Mumbai - 400003
Ph: 23425314
23401969
email :
abdullatifhabibbhoy@gmail.com (not sure whether working or not)
5mm : Rs.:100
10 mm : Rs.:40
Sandeep