Looks like a neat machine! Never seen one like that before! You might want to check with Kalsem Salvage in Waterloo Iowa. 319-296-2236 not sure if someone will answer the winter months or not but he may have what your looking for.
Most of what was in this area was OMCs and later Deeres. The swather that Hesston started with was first built in my area. I do own one of the 50 he built before selling it to Hesston.