195/65 15s is one of the most common sizes out there. Have you looked online say eBay? Personally I'd run them on all four especially if you're not used to driving in snow. Not sure what your deductible is but I bet more than a used full set of snows.

As an example. We had 12" fall here on boxing day. My wifes New Beetle TDI with Blizzaks was able to drive up our driving incline BEFORE I plowed. I hadn't put the snows yet on the Jetta TDI so I plowed first. It got stuck going down the incline (realized after I had a stuck rear brake caliper) but still going down hill with good quality 80% or better all seasons.

If you had mentioned 14"s I have several good used sets of winters. No spare 15s though. Sorry.

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- 2006 T1N 10 Passenger 2500 Sprinter- Family Hauler
- 1987 W124 TD Variant. Project.
- Plus several in "the works".