AFAIK, there is no seperate specific course for that.  You already have some with engineer / mechanical backgrounds who could/ should know between them what is required.  The great benefit, is they know exactly the type of circs and vehicles that you will be dealing with so it can be tailored to your requirements.   It reds like your team probably go to adhock locations that may have pits, lifts, trolley/bottle jcks of varying sorts along with beautifully grey painted clean level smooth concrete surtfaces as well as the potential for rutted gravel water filled driveways.  even if you do use an external trainer, I'd just make sure that the session covers the types of scenario your folks deal with, otherwise you will be no further forward than you are now.  ​​​​​​​You may find a bit more info on the circs involved may yield better results and responses.