Leonard,
My front axle is worn exactly the same way. The spindles themselves have very little wear, its the bore in the axle. I was going to have it machined out and press in a new steel bushing, but decided to wait and make it a future project. My spindles also have vertical play as well, so I'm just going to machine a thrust washer to take up this play.
BTW While I had the front axle off I replaced the mounting bolt bushings as well as the bolt. The new bushings from JD were oversized in outside diameter and needed to be turned down for a good press fit, likewise the bolt hole bore needed to be reamed for a good slip fit of the bolt. I'm not sure that all the 140's would need this done, but mine did.