ISO a tractor as a lawn ornament

I am still looking for an old tractor skeleton that I can put in my yard for the special needs kids I work with, to climb on and play. No engine required! Just needs wheels, a steering wheel and a seat of some sort...and the kids will use their imagination to play farmer! Limited budget but a promise that this tractor will be adored by young want-to-be farmers! Thank you, Nicola and Farmkids Therapy Ltd.