Anyone live by a truck graveyard ?

I have a Freightliner FL60 with an Eaton Fuller Ultra shift trans..

My gizmo that shows what gear I am in is going south and I am looking for a used one..I have a couple searches out but nothing has come back..

The part number is (I think) Fuller 5574603

You you can give me a name, I'll do the searching.

Thanks
Ian