HTC one M8 HC......Need stockboot IMG to run sunshine topic

I'm currently running liquid smooth and trying to get on viper1 my firmware is up to date ad far as I know 4.4.4 kitkat. However I do have S-on and I need to use sunshine to get S-off but I keep getting error message that say I need a debuggable stock boot IMG......please help I don't really know how to get this done

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