If you mean the electric hotplates, then they are quite widely available. You can get single or double units. I think Argos have had them, I've got a single one that was mail order from 'Scotts of Stow' I think. You do see them around quite a bit. Sometimes seen in larger electric outlets too - Currys/Comet etc. Certainly any smaller High St electrical shop will have them. I wouldn't be without mine - they're incredibly useful when you're on hook-up! Just watch the wattage, or you'll 'trip out' when you're cooking! Good luck.