Here's what I would do (in fact I did it years ago). Get a Spotmatic SL (no meter) and put a Nikon F screen in it. Yes it will fit. Yes 90% of the repairmen will tell you they won't fit. But they do. In the 70's you could get replacement screens put into your Spotmatic by sending it into Honeywell. They used Nikon screens!
http://www.mir.com.my/rb/photography/hardwares/classics/michaeliu/cameras/shared/ff2screens.htm
In the late 70's early 80's I had a Nikon E screen put into one of my Spotmatics (I had 9 Spotmatic bodies at the time). I also had a P Apollo screen put into my Spotmatic SL (which I still have).
Ebay is full of Nikon F & F2 screens.