heater in air cooled 911

[Russwhitehouse]

As the title suggests.
I use my old 911 for historic rallying over here in France in the Summer months, so heating is never an issue. However, i am doing some winter events this year and the car is like an ice box! The heat exchangers and a lot of the ancillary bits from the heating system were ditched long ago to save weight, so i have been looking at some of the electric heaters on the market. Anyone got a recommendation or some advice on the matter.
Cheers.

[Russwhitehouse]

Sadly no good on an air cooled car. It needs hot water to work. Thanks for taking the time to post though, appreciated.

[Russwhitehouse]

Interesting stuff.Looks like a nice compact unit too. Thanks for the info, i will make a few enquiries.