Yes, they could possibly exist!!! I am working with a company in China trying to design a 2-size pull-up option. I need help getting sizes a group would want to coop. I was thinking "standard" at 20-50 lbs and size 2 as 40-80 lbs. Would there be interest in the bigger size? Enough to get 250 ordered? If you would be interested, could you help with measurements so I can get a sample made. This is going to be a coop item, no profit made by me. When details are ironed out I will open a coop on Diaperswappers