Locally, Koiled Cycles 'might' be able to help you but the Jones bars will always be expensive because they are shop made in low volumes.
CRC used to do the Titec ones but I haven't seen them for a bit. SJS Cycles in the UK does the Humbert Boomerang for 13 quid in a 25.4 clamp...but they are out of stock at the moment. SJS are good for Oz shipping.