Soon I'll be relocating to the midwest and the particular town I'll be moving to is known for it's arctic temperatures come winter time. 6 degrees fahrenheit, -12 with the windchill. When I do eventually bring my car with me it will be parked either under a carport or in an unheated garage. I would like to install a block heater but the p2 one is no longer available for purchase from Volvo. Can the older one from the 850 or the newer one from a p1 or p3 chassis work? If not are there any aftermarket options? I've been told that a block heater isn't necessary for that climate but it seems like a fun project as long as I can get the correct parts.