I think I have a line on a pair of 1960 inline Merc 800's with speedmasters.........
I also have the 2 long shaft 1500's that came with our "wing"........ but I'm not sure if we'll use them for display on the boat..... In any event I will keep an eye open for you. May I also suggest that you try www.screamandfly.com . They have a nice swap section and it's outboards only.