Your southern neighbour, Argentina recently purchased a small number of the following for trials before a possible future order.
M13/34
A fast tank with Christie suspension. Something between a BT series and a Crusader. 13tons weight with 4 man crew and a 47mm main gun. Pretty fast but mechanical reliability is questionable. Depends if you can be bothered to wait a few years until its more reliable. That'll be around 1936 with the replacement of the Christie suspension with simpler leaf springs.
AB.34
A large armoured car that gives up very little to comparable tanks but is considerably cheaper and simpler to operate. And of course a lot faster.
Crew: 4
Engine: Isotta-Fraschini L1406 300hp
Weight: 12tons Length 5.90m Width: 2.60m Height 2.40m
Speed: 100km/h Power/Weight: 25hp/ton Range: 800km
Armament: 1x37mm, 2x6.5mm mg
Armour: 30mm-10mm