There is a snowmobile in Hazard Pay.
As for vans, just choose a truck or delivery van, choose one of the similar models (or make up your own name) and slap whatever picture you want to it. There really isn't that large of a gap in the SR4 system mathematically so they'd be pretty damned similar anyway.
For Single Person insertions, you can grab a Dalmation (2,200), slap a Self Contained Personnel Compartment (60,000 War! pg. 177) on it, and still have room for 12 armor (2,400). Total Cost = 64,600Ą. The SCPC can take a few extra mods also (it isn't too shabby to begin with).
A more expensive insertion route uses the Air Supply (more slots will allow for some armaments on the drone for support and the air supply has lots of storage space for gear, be it taken with or stolen.
Also keep in mind that you can lower the amenities to squatter and double seating. This will allow for the wasp to be a two man. Slap the SCPC on it and it becomes a 3 man. Saving up the extra cash for the stallion is the best bet for large teams though.