I went to a couple of oil distributors around here and got the same response from all of them, that it's not on their "list". I'm looking for TO10, AXO80 and HO46
Looks like the Komatsu TO 10 is pretty close to a heavy duty ATF fluid. Appears to be available in an ISO-32 and ISO-100. There are a lot of options you could use, so it will come down to price and availability in your area.