Real Tree lists dealers that sell their camo.
One that uses, but does not list selling the fabric is in the UK.

Wildlife Watching Supplies
Town Living Farmhouse,Puddington
Tiverton,Devon, EX16 8HW
GB
+44(0) 1884 860692

Or check their page ( Real Tree) http://www.realtree.com/products/par...=Camo%20Fabric