I had it on CD, passed it on along and wouldn't recommend going to much trouble or expense to find a copy. Goodwin seemed a fine fellow, was a Chesapeake guy and had a column in the Retriever Journal, but I found his plainly self-edited RFTIO was very long on anecdote and short on training principle and technique. Also recall thinking his progression badly out of whack.
If there's a one-size-fits-all resource out there, I've missed it, but RFTIO would be near the bottom of the long list I'm familiar with. Sorry, Butch.