G100 cup gun replacement cups

Hi, I just ordered and received a G-100 cup gun. I’m looking for a low cost-per-cup source of replacement cups. Looking at the design up close, it seems the only real limitation is the diameter of the top of the cup as it presses against the taper. It seems you don’t need to use the included clear plastic cup if you don’t want to, you could hook the spring directly on the paper cup.

The cups I’m using were described as 32oz. I’ve seen people use the cups with French Fries painted on the sides, and another with pineapples. Those go for less that $0.15-$0.20/cup if you buy a large number from Amazon (like 500).

Can anyone say for sure which style or model number paper cups have worked?