Product review (5 stars): Kind of expensive but these are well made and they are find to find these days!
These work well for my needs but the sizes weren't right for my old-timey stove.  I only have one big burner on my apt. sized appliance (a relic from the 1960's).  These are a nice product but kind of expensive.  I don't know why it is so difficult to find these things at a store.  The stores that have burner pans only carry the ones that have a full border for burners that are plug-ins so you can put the pan in and then plug the burner back in and have a nice all around rim.