Which website can I go on to find a large cordless warming tray for the cheapest price?
There are numerous models and brands to choose from for cordless
warming trays. Take a look at the very reasonably priced model
available here,
http://www.amazon.com/Toastess-TWT-40-Silhouette-Cordless-23-75x11-75/dp/B000LSX21A.