I read about the lost snowmobiler yesterday in the Chow Hall of the camp right after dinner. You were the first person that came to mind. I knew it wasn't you that got lost as they were very specific about it being a snowmobiler and I figgured you were a bit more self reliant and resourcefull. Bummer about your machine.
Busted an AXEL Housing? It goes on and off with a rod. The rod is soft iron and goes into an Iron Housing. They generally rust together solid and it becomes permanent. The "Fix" is to cut it off flush on one end, then drill and tap it for a large Allen Cap Screw. Unfortunately the large allen cap screws only come in Grade 8 and it will have knurels on it. You will need to grind these off or have a machine shop turn it smooth to the size of the Axel Housing Ear hole.
Odds are you don't have an axel housing. Crister may be your only source for that. I had one that I kept for a template to make spares but it's gone. Your best bet will be to either have one made out of steel, or try and repair the one you have. I have seen the Steel versions and they preform well. It's really not too hard to make. A suitable size piece of pipe, have the ends turned to the correct internal diameter to accomodate the bearings, the rest gets made out of plate. It's not a bad idea to put bronze bushings in the Pivot/Mounting holes, but just oiling it and keeping it greesed will work. If this joint rust solid as it tends to, you will no longer be able to adjust the front chain tension.
There was a welder in Healy Ak, that had a couple of "old styles" of which only one was running. He might hook you up with a used Axel tube or be able to make you one. He used to keep 2 running machines, one for hunting, and one for plowing snow. All the neighbors commented that his little machine was the "Best Snowplow" they had seen. I don't remember his name, but there can't be too many welders in Healy AK. His shop was by his house which is on the West side of the parks highway in Healy by the North Star Inn, that great big 800 Man Camp.
Good luck with getting your machine back together. I know that in Remote parts of Alaska, which is everwhere but Anchorage, problems of this nature can really test one resourcefullness. You'll need all the good karma you can get.
I spent roughly 15 years putting together a collection of ALL the parts necessary to rebuild or repair every make and model of Snow Trac, Snow Master, and Trac Master. Today is the first time I've regretted selling it off.
When I was planning to sell out, I had one associate who had a Snow Trac and we put aside a complete newely rebuilt variator, and a bunch of bogies, and just about an entire "Old-Style" in parts for him. It is possible that we set aside an Axel Housing. I won't know until I get home which will be in a few hours.
at least he was held up in a cabin. 
