I had to get mine cocosoya from TSC.
I wish I had a place to buy it in large portions. 5 gallons, like you do.
I actually feed a little Legends Performance Pellet to add flavor to my Cool Calories. It's 10% NSC. I've had a lot of success with it. You're right, Safe Choice isn't as low starch as they say! It's alright, but not for everyone. It's amazing what you figure out when you start researching this stuff. Seems like all the feed companies have their own definition of "low NSC".