Oh man, you just don't quit. First you bet me $10 I'll be the first person to answer your question, and when I'm not, you won't pay up. Then you ask about a problem with your torque motor and want us to give you the answer and then you insult me by saying you are going to send it to Duall for them to fix. What am I, chopped liver?
Well, after picking our brains and then giving your money to the folks at Duall, if you can still look yourself in the mirror, what can I say.
But to answer your question, those pins are peened in from the back side and there is no easy way to replace them. ARRI does not sell just the pins, even if you could peen one in again. You have to buy the whole geared wheel assembly and they are sold in sets of two, one for each side of the torque motor. If you were one of my clients, I would tell you that the ARRI part number for this set of "Gear W/Brake Axle" is K4.24709.0.
If you were one of my clients I would also tell you that unless you use your torque motor and camera in reverse an awful lot, I would just change the gears from side to side. Right now, your busted pin is on the take-up side of the torque motor, I would switch it to the feed side and put the feed gear (the one with the three good pins) onto the take-up side. But that is just how I would handle it if you were one of my clients. Since you will only deal with Duall, you will have to see how they would handle it.
Did that sound pissy enough?