I'm looking for a plancha, or basically a flat piece of preferably carbon steel, but stainless would be ok - anyone know where I can find something like this? Would a place like home depot sell slabs of stainless steel? I am mainly looking to put this on a grill/over a fire, so size isn't a main concern.
Debuyer has what they call a plancha, but it really is a grill pan having raised ridges.
I'm currently using a double burner lodge cast iron griddle, which certainly works, but would be nice to find it in carbon or stainless.
I second what paulj said: try a Mexican comal.
Or if you want something a little different, check out this plancha by Staub: http://tinyurl.com/plancha
He hasn't used it yet, but my husband received one as a gift. It seems to be very well made. I like the fact that it would be hard to accidentally push something off the back.