Gents,
Thank you for all the leads and ideas. I have the ability to make one myself in my shop but wanted to buy one if I could. I actually found that GM part number, and it's obtainable, but the fellow with the old tractor (Gibson) has found more problems with it and has decided to stick it in the corner and deal with it another day.
Again, thank you for your valuable input, and have a nice Christmas.
Stuart