Hey mate - the warranty should extend to the case. I have the old 11-33x50 Razor, which I bought used and didn't come with a neoprene case. When they brought out the new Viper 11-33x50, I emailed Vortex direct to ask if the neoprene case would fit, and if so, could I buy one. They asked for my address and sent it free of charge from the US. That being said, I'm also not the biggest fan of their neoprene cases either, and I've just ordered a Razor 13-39x56, so if that Hawke case does fit, please could you let me know?
Cheers