I'm waiting on two books on Latin American armor...which seem to be lost in the mail at the moment
I was hoping they would provide enough details to be work. Armor introduction and out of service dates seem to be some of the hardest information to come back. There's also no hints at any sort of organization usually. The orgs are much easier to fudge though, once you get some sort of basic understanding of what was available and when. This is very much how certain elements of both my Philippine and Haitian OOBs were done.