The factory fill fluid of toyota is actually undyed ATF original formula dexron II heavy duty, if you wish to buy it then instead of toyota you need to head over to the mercedes benz dealer and ask for the old yellow power steering fluid.
Febi sell it in afternarket too in 1 liter bottles (sold at mercedes spare parts shops) its cheap too.
Or you can just use ATF dexron 3 or 6, which are back compatible perfectly.
If you have a very cold climate issue like if you live in skardu or hunza then use a full synthetic atf or a low temp hydraulic oil (toyota specify their EH fluid for such areas but they dont sell it anymore at their car dealerships, you need to head to the toyota forklift dealer and ask for hydraulic fluid for forklifts used in reefer warehouses. - they will sell you that fluid in a metal can.
Car care nut channel is pretty nice but some information is a bit off (for guys like me) - e.g. I came to know of the factory yellow power steer fluid by looking up the material itself then checked its data and safety sheets and found its spec and match.
Modern GM factory power steer fluid is the same performance too but has different chemistry, it works great in toyotas too but is almost clear.
