There have been models of tractors, backholes farm wagons, and plows but don't think any are in production right now. Don't think there were or are any kits of combines. I, myself grew up on a farm and reflect on my farmlife heritage often. You may want to checkout the website www.toyfarmer.com they have a good magazine too and one can get back issues. Often they have pictures and articles about people who custom build models dealing with the farm idustry. Also check out the website of Don Campbell. just type in Don Campbell on search. He is very good at making custom scale models of trucks , tractors, combines , etc. He builds his models of metal. If you are just looking for shelf models but not a kit there are a plenty of scale models out there of farm machinery. hope this helps!