Replacement for curve

Hi everyone!!

So i've decided to have my slave by a second cock cage. He wears the CB curve and i have a hard time putting it on him as he can't work in it i have to replace it every night. Well except the weekends. He is quite large and the curve is a tight fit. I've been looking at threads here and researching for a larger cage. He brought up the holy trainer but i think its way too small.

So i guess what i'm asking is what is a good long term large cage to consider?

Thank you for any help