Since the plans for Jeeves are BOP, as is the controller to summon him, my only way to get the plans would be to get it while recycling a mechanical's corpse. There was a Draenei Deathknight that appeared to be a bot running around the library area in Storm Peaks, killing the robot gnomes on mechanostriders. After recycling about 60 of them, I got the plans!
To make Jeeves, I needed all 3 kinds of repair bots, and two of those plans are BOP drops. However, the repair bots themselves are not BOP, so I could have another engineer make them for me.