Just a quickie today to say that for all you UK folk out there Aldi have a pancake or crepe making machine for less than £15 and it works very well as a griddle. It has a numbered temperature controls rather than actual temperatures, and it is of course round. Other than these two minor considerations, the one I bought works brilliantly. What is more it makes excellent pancakes too! (I thought I ought to check this out before it became dedicated to softening FP).
I used aluminium foil, baking parchment, teflon sheet, or the mini baking trays that Lakeland have on the griddle / pancake maker and they all worked splendidly.
If you want one then get your skates on as these things never hang around, and that is never more true than at Aldi.