Some years ago I was a shepherd on a mountain with milking cows and making cheese. I had an opportunity to be by the cheesemaker all the time and I did some cheese wheels then and later at home.
There have been some old wooden cheesemaking hoops and some new ones that were plastic. We were making cheese wheels 2 to 4kg in weight, up to 15 wheels per day.
Search for cheesemaking wooden hoop. Since you will work with smaller quantities go for the smallest ones. Here is a link for clarification.
Since it is simple to make you can DIY. The wood used at our place is maple, but ash would be a good choice too, IMO. The rope around the hoop is to tighten it to a desired size. You also need a cloth - the hoop is just for a desired shape...
Hope this helps,