Well despite doing very little 'coverage' I might need to order more sheets, so definitely not for sale. I'm doing the project in both my cars, little by little, as and when I get time from work.
A very important detail is that these are essentially closed cell foam sheets which work as sound blockers. For a proper project these need to be used with vibration damping materials, for which I'm using butyl rubber bought locally from an audio shop here in Karachi, as well as 3M Sound Deadening Pads that I keep ordering from Autohub as and when required. Here is proof that these are genuine closed cell foam - I took these pics.