GL3 Gear oil in Transfer Case? (Need to source!)

Trying to go through all the fluid changes with my new to me 1995 Hiace. I was able to find this site which summarizes the recommended gear oils for the differentials, etc.

https://toyota-club.net/files/techdata/ttx/hiace_100j.htm

My main issue is I can't find any GL3 gear oil for my transfer case. A bunch of Gl4 and GL5 available in the same weight, but I heard the extra additives in those GL specs can hurt softer metals.

Anyone else have this issue (I'm located in the US)?

I did find this, but don't exactly need 20L

https://www.amazon.co.jp/-/en/Toyota-Genuine-Special-75W-90-08885-01513/dp/B0081Z3UXK

Thanks in advance.