Yup, the [Field Repair Bot 74A] acts just like a vendor (more specifically it acts like a engineering supply vendor) that people not even in your own group can use. Sort of sucks that they do not leave anything when their time runs out. You can pick up the schematic in Blackrock Depths; it is lying on the floor next to Golem Lord Argelmach. Requires 12 Thorium Bars, 4 Rugged Leather, 2 Elemental Earth, 1 Elemental Fire, and a Fused Wiring (might need something else, but I think that is it) to make. The bot requires engineering 300 to use.
-Renim (60 Rogue, Gnomish Engineer, Medivh)