Hi Piyush,
You could try Greenlam grey coloured sheets which are available in sizes 3X7, 4.25X10 5X12, 5X6, 6X12 (all Feet); thickness varies from 1 to 1.5mm and upwards.
My friend has used (1) No.929, Metaline Grey and (2) No.270, Sliver Grey (both non-shiny matte surface).
images on these are 'acceptable' and 'enjoyable'. I have had no opportunity to compare them with international brand screens, but these laminates do certainly hold up against any ordinary (5-10K) screens. I am planning to use one of these. When you are immersed in a movie, you hardly notice any difference. Laminates do not have wrinkles, are long lasting, washable, and are easily maintained and cost effective.
have your laminate suitably mounted; large sheets require centre support.
Greenlam has a huge sample collection which your local carpenter or greenlam seller will gladly show you.
Good luck and get back on the forum to share your experience.