Hi Rhino,
I cannot help with local providers of LT instructor courses, but you could contact RTITB or ITSSAR for info on local providers. They may also provide their own courses.
With both RTITB and ITSSAR courses, you would have to take the basic test on your chosen truck (if you have both c/b & reach, try both). The pass mark is at Instructor Level (25 penalties, rather than 40 for operators). Thereafter, your assessments are probably:
(ITSSAR) Giving a theory presentation, Conducting a practical demonstration, Delivering a practical lesson (which may be combined with the demonstration), Setting up and conducting a skills test and Writing an end of training report. These take place during your course. Most centres will provide detailed notes. You will also do an associated knowledge theory examination.
(RTITB) Training in practical demonstrations and practical lessons. Some will also give practice in delivering a theory lesson. Training in setting up and conducting a practical skills test. Your assessments are in the Instructor's examination on the last day: associated knowledge test, a nominated demonstration and practical lesson. Again, most centres will provide course notes.
Both organisations will provide training guides, materials, etc., but they may be chargeable.
As the courses are in Techniques of Instruction, which are common, the types of truck used are generally electric counterbalanced.
I hope that this helps, but please bear in mind that, although I have worked for both organisations and have now been retired for a little while, my information may be a little out of date.