I picked up a couple of flat cookie sheets since my toaster oven pan has a wavy bottom and a wire grill. Problem is they are just a smudge to narrow to fit in the grooves that hold them securely. They have rolled edges so I was thinking I could unroll them some with little chance of a decent result. I could flatten the rolled edge and hope the edge expanded the needed amount. I could grind the non stick coating off and weld a bit but my cheapo welder would probably blow right through the pan. But then I got to thinking about attaching something that might clip or slit on on to the edge somehow to give it the slight increase in width. So with the collective wisdom here I thought I would see if there were any good ideas?
I keep thinking about something like a brass tube sliced down the middle on one side but I've got nothing that would make a cut like that.