#1 diesel and kerosene are the same. Kerosene is lighter and has slightly less heat than pump diesel, which is #2 diesel. You can cut pump diesel with 10 - 20% kerosene and eliminate your gelling issue. If you do cut it however, you should also add a small container of 2 cycle oil to replace the lubricity that the kerosene does not have.Up here the answer to fuel gelling is to use no 1 fuel oil. It's in all the outside home heating oil tanks and all the diesel trucks and heavy equipment here runs on the exact same stuff. We had 76 below official (without wind chill factor ) one year and regularly see 40 - 50 below each winter and all the houses oil stoves and diesel vehicles fuel keep flowing. I have a 55' of 3/8 copper tube running from my outside house oil tank to where it enters the house and it flows fine through all that tubing. Maybe you can't get pure #1 fuel oil but if you can it's the universal solution up here.
Post 28 - Also I have used a 1000 watt freeze plug heater on my CUCV, (Kat"s brand). They do make them and are easy to find at parts stores here and Amazon.
hope this helps.