Bill,
The ALPHA was, at the time, ground breaking technology in terms of its compact format and capabilities. It would not surprise me if custom 'specials' exist as the result of specific customer needs. Much like Pulnix 'building block' visible light cameras can be found in all manner of formats and brand names to suit industrial applications. As I am sure you know, it was designed to be a versatile thermal imaging platform for UAV use so I feel sure many different optical path options were available for the military.
I know a little about these ALPHA cameras as I worked with one many years ago but sadly I have not been able to buy an example from the USA when they come up in auctions because of export controls on them

A nice OMEGA sold recently for only around $300. I was very sad to have not been able to buy it.
Bill, if your Alpha ever needs to be re-homed, please think of me, even if it is broken.
Fraser