Hey Paul,
In 2014 I had my injection pump removed by a mechanic in Rocklea (Brisbane) for it to be sent to a local diesel injection pump rebuilder.
I never found out the rebuilders' name.
I could ask the mechanic for the rebuilder's contact details if you want.
There is a Diesel Injection pump specialist at Arundel GC.
http://www.goldcoastdieselspecialist.com.au/I have no experience with this business.
Alternately you could call some independent MB Mechanics and ask who they use.
regards