A Set of Wheels

[Ransomes AM54]

Does anyone know of a dilapidated, rotten, and absolutely knackered straw elevator (straw pitcher, straw jack, etc.). A little like this:





They're quite big (not the little folding type) and were mainly used by contractors rather than farmers, but there must be one or two still rotting in the corners of fields or yards somewhere.

I am desperately seeking a set of wheels for one. Foster would be great, but Ransomes would do. Iron would be fab, but pneumatics would be fine for now.

thanks in advance!