I have never seen one around here which would appear to say something about the practicality of the concept.
To have a snow clearing track a little wider than the truck, you will need a 7 foot blower. To handle any but very light snow that will need a 50 to 60+ hp engine. (I have looked into a 3PH blower for my 33 hp tractor to augment my truck snowplow and the widest blower it can take is 5 feet). That 7 foot blower plus the large engine plus the truck frame to hold it and you will have 800 to 1,000 pounds hanging out there. You will need a HD truck. And there will be another engine to keep running in the winter. Also I would expect the cost to be much higher than a snowplow.
If you want to move snow with your truck I would suggest starting here:
http://www.fisherplows.com/fe/index.php