Not too sure of anybody in Qld selling this kind of stuff, but I am in the process of doing a very cheap servo retrofit on my machine, if it is successful you would be welcome to have a go at something similiar if you want, I could help out where possible.
What level of electronics experience do you have ?
What kind of machine do you want to make ?
How computer literate are you ?
Sorry for all the questions but this will give me an idea on how to help. Where do you live, I am just south of Cairns (Babinda).