For all my Indian rc hobby fans. There  is a major issue that people don't get depron easily and if they get depron it is too costly for the reason I don't know. So today I kept on thinking and I teared off my mattress and believe me guys it was made up of depron and that mattress cost me 1500 Rupees and I made a rc plane and it flew well too
So many of us can get depron at very low price from any local unbranded mattresses

Thank you all for time and hope my idea works for you all

yesypu can get it on vortex rc
link below
http://www.vortex-rc.com/product-category/building-materials/paper-laminated-foamboards/

check it out

Except this is there a cheaper online retailer actually till now I have been using thermacol so it was cheap

Congratulations on your discovery!
Please post a picture of your depron mattress for our benefit...
And how did you cut sheets from it.
Thanks

Actually the mattress was cheap one so it had layers of mattress of 4 mm thickness approx 4 sheets and then a songy foam layer