L2800F transmission/hydraulic fluid type?

[sandbag3]

Other than transmission fluid from Kubota is there another cheaper alternative for my L2800? Sam's has has the folllowing for about $36-40:
- Certified R & O Hydraulic Oil AW-46 - 5 Gallon Bucket and
-Certified 10W20 Hydraulic & Transmission Fluid - 35 LB Bucket and
-Certified Hydraulic Oil AW32 - 5 gal. Pail.
Is it safe to use any of these on this tractor? The serial number is 10153 and Tractor Data shows manufacture of these machines took place from 2004-2010. Bought it used in 2012 and it had lightly used 400 miles on odometer.
Thanks in advance for assist!

 

[North Idaho Wolfman]

Mystik JT-5 is a safe alternative

 

[ejhenry001]

What about Shell Rotella HD Hydraulic and Transmission Fluid? I've read other places that seems to work well and is a much cheaper alternative to the Kubota UDT/Super UDT's? Any others tried the Rotella?