With my mind set on trying to make more terrain I popped into the local hard ware store and picked up 2 metal rulers like the ones below. They are mostly to help with cutting the foam-core as the blade just cuts into the plastic rulers. They also had inches on one side and cm on the other so that is also really cool.
I picked them up for R20 ($1.8) and R18 ($1.66) respectively.
Also in my search for the elusive "granny grating/plastic canvas" I came across this alternative online, its called "self adhesive mesh drywall tape" its quite a bit softer then the plastic canvas but it does have the grid shape so it definitely will come in use at some point. I've seen it used to add texture to plastic card, (gives a sort of metal platform look). I'm also keen to try use it as the entrance to a sewer drain I hope its thick enough.
|Self adhesive mesh drywall tape|