There are a few clubs in Australia. They are mostly using the Danish rules and primarily do hopping (just jumps), but I think there are a few doing agility as well. I am really not sure exactly where they all are based though.
Jumps are pretty easy to build and don't have to be too expensive. You can use 1X2's for the stands and than something like 6X6" and 1" thick for the base. If you do taller than about 18", you may need a bigger base. The poles are usually about 2ft wide. The spacing for the poles is about 2-3". You would want 3-4 jumps to start so your rabbit can get used to doing them in sequence.
Other equipment is a bit harder to make, but still pretty easy.
The important thing is safety. Poles need to fall off easily from both directions. Some rabbits will head butt poles or run into them going forward and others will kick out, a few rabbits might do both. It is also a good idea for the jumps themselves to fall over if they get knocked, they don't need to fall easily, but should give is pushed or just move a bit.
You could even use something like a pole on some bricks to start, the pole should be on top of the brick so it will fall.
Agility and Rabbit hopping are fairly safe events. The equipment needs to be build safely, but rabbits really aren't apt to hurt themselves doing it. There are some rabbits who will binky over a jump or even crash into one and be fine. The rabbits love to do it and usually don't need much encouragement to go.
