Peter here is what i suggest. you might have to call around to find this stuff but it will make nice panels. Cover them with a fabric as was mentioned above. it does not really matter what brand just a similar product. http://www.specjm.com/commercial/insulation/insulationboards.asp

There is a JM distributor here:

Pacific Home Building Centre

3730 Trans Canada Hwy
Cobble Hill, BC V0R1L0
(250) 743-5584


HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB/RB 2026, Reaper 7, Harrison Mixbus 11 , Presonus Audiobox USB96