Has stocks for the Marlin. As Viper told me, the 882SSV, 17V, 882SS, 17VS, 25MN, 25MNSS are all the exact same actions and the same stocks will work for all of them. So anyhow these guys make them, just have to wait a bit for them to be sent to you unless they happen to have one that is already made up.
Not sure about the barrel. I think the barrel in the Marlin V and VS appear to be pinned. Which means to me that its not just a matter of switching barrels but would take more work???