Not sure if this is what you are looking for, but we built one and it works very well. The price is right too.

Follow this link to see it yourself.

https://www.youtube.com/watch?v=A5bCkBog2aU&feature=youtu.be

If the link doesn't work go to you tube and search for " Mikes hand trommel screen change".

Chris

Wilson Brothers make one, and so does Alan Trees under the Gold Grabber name.  Cant go wrong with either, both make quality gear.  I believe Royal has one in their lineup as well,  If they do, another piece of well made gear.

 

A cheaper route, if handy with DIY projects, is one with the frame and legs out of PVC, trommel tube out of a couple of cut 5 gal buckets and hardware cloth screen.  Just google homemade trommels and something bound to pop up.

I have spent a lot of time using a Wilson trommel , well made tool , no Mickey Mouse bs at all , well thought out and built. Where are you planning to use one? Reason I ask is because if your going to use it in a recurlating set up the tub is just as important as the trommel itself. The water has to be 100% free from organic material. If not you will get real tired of un-plugging spray nozzles and bars. Muddy water ok / pieces of twigs roots grass / bad.