Bishop wrote: Kerry, that's very kind. I'm actually after non-slip tread pattern rather than mesh, but thank you for the offer.
You could always use brass mesh over a plastic sheet, paint some liquid glue on it and then pull the brass off, it will leave an imprint of the mesh in the plastic which you can then gently sand down until it's the desired effect.
Bishop - just passed my (failing) mind - were you after 1/16th scale tread plate ?, if so I have some laying around (plastruct, say's 1/24th but it's way too big for that scale).
I'll drag it out a take a photo (with ruler) to see if it's suitable.