If you have been to their website you must have noticed that their e-mail is not open to the public, I tried ringing them also without success. I am sure the plugs would have to be competitive in price, this is a huge worldwide market. Yes I also wondered if they would create too much heat and my question to them would be if the plugs will be available in heat-ranges as per normal. I will keep an eye on them and fill you in on updates.
Henk from Oz