You might try looking around for some of those 1990s-timeframe Jane's "pocket guides" on AFVs,
those ones that sold for US$14.95-19.95 (and perfectly sized to fit in a US Army trousers' cargo pocket)
I know there's at least one of them out there with the Cobra in it, but not being home right now, I couldn't tell you what specific year it was printed (definitely try for earlier 1990s though...).