Matt,
This is the place, (link below)
I believe the part # for the QD 38mm bushing is Q1 38mm
Less than $30.
When I bought mine it was free shipping on orders of $25, or more
Not to Oz I'm sure
Just use the "contact us" email, they were very helpful. Maybe will ship in an affordable manor
I used a 16J80Q Browning 16 grove pully and industrial serp belt, 1 1\2" wide belt (lots of surface contact)
and a Q1 38MM Browning split bushing.
I bought my pully off Ebay then had to figure out what kind of bushing fit it, made a trip to WW Grainger to determine it was a "Q"
Grainger did not have 38MM but could order with 4 month delivery Maybe.
I found this place(E. B. Atmus Co., Inc.) to get the bushing, they only had one in stock.
They did say it was a stock item for them ,so they would have more by now.
They also carry that big pully for about twice what I paid, now it is $156.
No chirping on the flywheel!!
The belt was another $90 with shipping from my local bearing supply house, had to be ordered from their supplier "up North".
I have all the specifics on the belt if anyone's interested.
The Q1 38mm is past 3\4 down this long page, go to the Q's it is listednumerical and alphabetical
http://www.ebatmus.com/search.epl?Query=q1E. B. Atmus Co., Inc.
65 Main St, P.O. Box 1689, Springfield, MA 01101-1689
Hope that helps
Bob P