I thought best to update this as I have a result, which I am hoping to be a good result.
It turns out that Amayama are able to supply the parts, just not the parts book to check the numbers against, I had to do a sneaky and find the numbers from the local Mitsubishi guys who gave the best price they could do at $2,100, and from Amayama it is $960.
Parts on the way.
JUST HOPE THEY ARE CORRECT