I am currently grounded (temporarily) so I have not used this company as yet... however...I have spoken with them and found them to be most helpful and knowledgeable.
They are based in Lidcombe NSW. They manufacture stone guards, sun visors, dust deflectors and they deliver Australia wide.
Hi Steve. My quote may not be relevant to you as I have a Hi Ace Commuter. Because it was built as a 12 seater bus it is wider than an average Hi Ace and therefore needs a larger stone guard.
The cost quoted to me was $177. plus $57. to fit it. They also freight Australia wide but I did not need a quote for freight as I go to NSW a few times a year.