I know it's a few day's
ipso facto, but for those in Melbourne's eastern suburbs the best place for the Ebony Star is Ringwood Laminates, they have kinda got used to me over the last 15 years. I've been sending ATM's there for about the same length of time.
If you say that you need it for a telescope bearing they will look after you.
To do an 8" base (340 x 340mm) cost me about $10. At the same time I got some for my 13.25" base (400x400mm) for another $25. These were taken from offcuts.