Does Bosch or Rain X actually make a Viper wiper blade? I thought the issue was more that the Viper used a very unique mounting method that isn't like any other car so you didn't have any other options. My backup plan one of these days was to see about frankensteining my own set. I've only ever put one new set on my car, but I kept the old ones (or at least I thought I did, would have to find them...). They are basically just a piece of spring steel with the actual rubber glued to them, and the rubber looks like your typical wiper. I was going to strip the rubber from the old set and see about gluing on my own from another wiper of similar size. It's awfully fiddly, but I've heard that it's been done before.