Where can I get this?   Any other comparable alternative other than wood/paneling to do a LQ?   Also, let me see your DIY LQ.  THANKS! :)

You can either buy it at fabric store.  Or on line.  Go to the fabric store and see if you like the way it feels first.  

I did poly wall/polyvinyl in a dressing room before.  Insulated, then put the polyvinyl over it. It did great on the ceiling since it has some flexibility to it.