Anybody know where I can buy sheets of cardboard?

[AceTKK]

I'd like to build a full-size mockup of my cabinet before getting down and dirty with the MDF.  Where can I buy 4' x 8' sheets of cardboard?  Home Depot and Lowes both say they don't carry it.  Any ideas?

thx,
-Ace-

[Xphile]

if you live near a coastal port check any one of the local timber mills -they use 6x8 sheets of cardboard to cover lifts of ply...conversely, I know for a fact Plum Creek MDF2 comes in lifts with said 6x8 corrugated sheet of cardboard on top, so check at you local lumber yard.. it's against bylaws to throw cardboard in the garbage up here, so even tho' they may not have "brand new cardboard", perhaps your local yard/home depot will have a couple topper sheets kickin around , or even in their 'cardboard only' dumpster/bin..if not you could try asking them to save you some from thier next couple lifts..

edit:
you already thought of furniture/appliance stores, right?
(according to my kids, fridge boxes make great houses, so why not great cabs? :-)

[PoDunkMoFo]

Maybee go to a plastic shop and see if they have any cardboard used to protect plastic sheets.

[MinerAl]

Look in your yellowpages for "Packaging Materials."  

You might also want to try styrofoam.  You can get all the dimensions exactly the same  with a 4x8 sheet of 3/4" styro insulation board.  Not super cheap, or tidy (styrodust everywhere) but you'd have a really exact, easy to move and alter working model.  You might even be able to test mount your T-moulding on it