Lordy Craig, all those different designations just got me confused. What I am looking for is the Marine version of the Sikorsky H-5, or HO2S. I am pretty sure he's calling them an HO-1 tho. It is the three seat version where they took one side's door out and loaded wounded in crossways behind the pilot. I believe the HO3S' main difference was in the seating arrangement-it was refitted to more easily load wounded into it.
this is the version after the one I am looking for. It's close, but not quite. If I'm going to get him a photo, I'd like it to be the one he worked on specifically (you know how picky air nuts are--it'll bug him

Now, the model could be any of the H-5's because I can modify it to make it right.
Inspector, I'm looking for the version right after the R4. The H-5 had a rounded look to it. I'm pretty sure HMX-1 (the unit his crews and helo's was pulled out of) had traded all their R-4's in by the time he got there. I know there was at east one of the H-5's produced somewhere, and there is a fiberglass body that you can put an RC helicopter into, but it's sort of large, and converting it would be a pain in the tuchus...