Oops, I didn't realize that he had an SVT.
Another option is to try and find yourself some 16" take-off wheels from either the classifieds, ebay, or a salvage yard. The going rate is around $200 for four wheels in decent condition.
Plus, you may save yourself a few bucks and have a better handling snow tire if you go with a skinnier 195/55-15. The overall diameter is slightly larger, but if you are at stock SVT ride height and are running OEM offset wheels, you shouldn't have any problems with rubbing.
Again, sorry for the mix up. I didn't read your sig.