Training needed with Technical Illustrators in mind

Howdy y'all-

I will be leaving my current position in a couple of weeks. I have done my best (in 4 days) to train my replacement, a non-graphics person. Also, I have tried to back up the knowledge base by giving some training to a few of the engineering personnel. My boss thinks it would be a good idea to get a trainer in-house to give some more formal instruction, but we haven't had a lot of luck coming up with anybody with a manufacturing background.

Anybody???

 Thanks.