I assume you are looking for the roof rack cross bars? There are some on eBay that are not OEM for good prices and likely some sellers will ship to AUS or at least time it to ship to you while in CA but I am not a big fan of the no-name brand racks.

Example here

I bought some brand new BMW OEM bars (the newer lower profile version) from a member here. Our classified ads are always a good source but there might not be any for sale at this time.

I'm not sure what your budget is but you can find brand new BMW OEM bars from site sponsor ECS Tuning for $195. CLICK HERE They can surely arrange for shipping to your hotel during your next trip to CA.

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