Yeah, strange request. I want my ROTF Bumblebee to have 2 arms, so I am looking for a Premium Bumblebee, or just his arm. Send me a PM if you have a Premium Bumblebee or just his arm! See, he has a cannon arm? I would like a normal one.
I did the same thing you're planning only went a little farther with it. I took a Premium Bee's arms and lower torso and put it on the Cannon Bee. Not only does he have 2 arms but his back windows fold up right in vehicle mode as well. Of course now I'm selling all my stuff so don't need him anymore. Still looks really good though when done.
You missed it Wazzpinator! I had one on my sales thread for 3 bucks MOSC. I just wanted to get rid of him. Maybe next time.