They have them on Amazon...
https://smile.amazon.com/Round-TUIT-When-you-get/dp/B07K6WVGX8/ref=sr_1_4?ie=UTF8&qid=1548680885&sr=8-4&keywords=round+tuit
Gary
Now you're cooking with gas!
I'm sure whatever it turns out to be it will be leaps and bounds ahead of the little coop you started with.
Good luck going forward
Gary