Just FYI, another option is to wire the OBC up to a dashboard switch. It would fill one of the blanks on the left side of the radio. I ended up doing that instead of buying the stalk, because it is much less expensive! Just a thought
I am looking for one too, but mostly so I can enable cruise control. So if someone is removing their 3 stalk in order to add the 4 stalk I would be interested in that too.