Never heard of them and we are currently getting an aga reconditioned, an oil one. Did a good bit of research on them and what you are saying is exactly what we would have wanted but didn't find anything like that. I know if you turn an Aga off and next day turn it on again it takes a good while to heat up. My mum has one and when she gets it serviced it takes over 24 hours to get it back to the full temperature. The only one I have heard of is the electric aga but they are really expensive and really have to be bought brand new as they are only on the market a few years. I would try ringing Haldane Fisher in Newry and ask their advice as they are big Aga dealers on new and reconditioned cookers, see what they think.