FYI the link I posted on the Netherlands OOB about Dutch surplus weapons sales has some very interesting info for a V2.2. Mexican Army as far as where they might have got weapons
if you look it not only has weapons they had to dispose of but how many, where they were sold in the real world timeline and most importantly what they cost - i.e what the sale price would have been
https://www.bicc.de/uploads/tx_bicctools/paper5.pdf
you hardly ever see info like that
i.e. 1995 cost for a Leopard I tank - 100,000 dollars, M113A1 30,000-75,000 and some going as low as 25,000, M110A2 for 300,000, 81mm mortar for a 1000 bucks, M-1 carbines for a 100 bucks, etc..
want to buy a company of Leopard I tanks and an ARV - that will be 2 million bucks
need 10,000 Uzis to equip some new reserve infantry regiments - that will be another 2 million bucks
meaning you could actually possibly price out what it might take for the Mexican Army to buy a bunch of stuff for V2.2. for the increase in their army that occurred courtesy of the Netherlands Army