Over time I have found the following to be a good source of parts
Kenmer Engineering for wheels and spinners Martin on 03 9 701 6037
Doug Pearse for general repairs, painting and some assembly/finishing of Cobras in Lilydale Victoria.
Finishline on the forum here for general jewellery parts either Enzo or Paula
Chris at McDonald Brothers Racing for engine work and chassis work and set up. Melbourne 039 4650000
Have fun...