Shipping was pricey. Sea freight was $2400AUD (~$1600USD). Air freight $3755AUD (~$2550USD). I went with sea freight. It took right on 4 months. I had to get a customs broker to clear the shipment in USA, $260USD. Then the warehouse fees charged by the shipper themselves was another $300USD upon pick up; which I wasn't overly happy about. So in the end I only saved approx. $400USD at the cost of a 4month wait lol. A small win. Although I also don't know if there are any additional fees for air freight.
The price was quoted by SCD Performance. I had them look after shipping. I did also do some independent research on freight carriers and got some far cheaper quotes. However after reading a lot of reviews, there were some horror stories about the cheaper companies, hiding fees and holding freight hostage. I was also really skeptical about such a large price delta. It was hard to find recommendations as I imagine independent shipping from Oz to USA is relatively niche. So I decided not to risk it and went with SCDs carrier.
I didn't order through the website. I sent them an email. My contact guy was Grant. I also had my parents, who live in Brisbane, go and visit their shop. Grant sent me the invoice via email and I ran my card over the phone.