I made the trip (50 miles each way) to New England Propeller in Plymouth, MA (they closed their S. Boston office).
I left them with the three big pieces of the shaft; one with coupling attached, one with the prop attached, and the piece that I took out between them. They're going to press out the coupling (Dave offered to try and salvage the old coupling that you see above. I told him not to bother. Once the moths get out of my wallet, I spend like a drunken sailor.) They are also going to remove and re-balance the prop.
On order is a new coupling, a Stainless Steel Prop Shaft, and a PSS Shaft Seal, a fit & face of the coupling & shaft, and a re-balance of the prop. I'll post when it comes in, and try to remember to take pix.