The "drive gear" parts you need are probably just either a friction disc, belt, or adjustment. Those should be easy to find at any small engine repair place. Without the model number we can't tell you exactly what you need so you would have to just take the old parts with you. The skid shoes are probably universal, just measure the distance between the bolt slots. Most are 3 inch center to center, but some are 2" or 2.5". If you over pay for everything that is 2 skids, 2 belts, and 1 disc at $10 each for a total of $50, but probably more like $30.
Your big problem is going to be the auger gear box if that is damaged. Those gears can be like $80 - $100 and more for the hole assembly. If it is bad you would be better off finding another used machine with a blown up engine for dirt cheap.
I have ordered parts from:
http://www.mfgsupply.com
http://www.jackssmallengines.com/
Other places you could check is:
http://www.amazon.com/
http://www.tractorsupply.com/
http://www.milfordpower.com/
http://www.tulsaenginewarehouse.com/
You would be best off getting the model and serial numbers off the back of the frame below the engine and getting a parts manual to look up parts.
This message was modified Oct 18, 2010 by Shryp