I've been trying to buy some stainless steel shot to use for
tumbling that has sphere shapes only.
Gesswein may still carry 1/8" stainless steel ball shot in 10 pound
packages. It used to sell for $140 to $150 for 10 pounds. They
also carry other homogenous shaped shot like ballcone, diagonal,
oval, etc. or the usual mixed shot. Shipping to Australia may make it
cost prohibitive since most tumblers take more than 10 pounds of
You might check out shotgun, hunting gear suppliers. They may carry
steel shot for use in cartridge burnishers. I don't know if they
carry both stainless and carbon steel shot. It might be worth a try
since you may be able to find a local outlet in Australia. Also, not
being a jewelry industry item, you might save money going the guns
and ammo supply route.