After searching for the Castrol and Royal purple products, I chose to use the Ravenol MTf-3 synthetic 75w from Amazon at $14.90 liter.
I couldn't find Castrol product mentioned above except in EBay/UK and not shipped to USA.
The royal purple had a similar problem with shipping cost being more than oil cost. My best effort on the Toyota lube was about 38 per qt.
The Ravenol looks to be a quality product from Germany and currently available at Amazon.
I also looked at the Toyota part numbers on the Ravenol label and had Google translate the Russian pages to English, it was the same photo of Toyota oil recommended in my owners manual, so I can only guess these are Toyota European part numbers.
Good luck and thanks to above contributors for tips on the alternate brands.
2010 Gen 5