Looks like most of the games mentioned (Destroyer Captain, Bismarck, Ironbottom Sound, Norway 1940), have used copies for sale on BoardGameGeek in the range of $40 or less. Here's the BGG designer page listing his games: https://boardgamegeek.com/boardgamedesigner/1144/jack-greene
Thanks 3MA for another interesting interview with an old-school wargame designer. Looking forward to the next episode of Bruce Geryk's History of Cardboard Counter Manufacturing podcast.