The March 2007 issue of Model Airplane News has an article on making and printing "Homemade Lozenge Fabric". They have a scale-able .BMP file that you can request from them. (www.modelairplanenews.com) Also a back issue of the March 2007 can also be bought from them. I have tried it on Koverall, the ink goes right through it. The author used a cotton/poly fabric.
Joe