>grind my way to wherever in the tech tree
>it is.

Tier 7 in the 'Standard Armor' tree, sold by Sophie the Gunpeddler.
The other side of the same tree does German tanks, it seems, and offers the Leopard, which is the one I want, since I've taken a ride on one. Yes, on.
And, since I ALSO want the Tier 5 armored car recon vehicle in her trees. And, while I WOULD prefer another arty...the Panzerhaubitze 2000 isn't BAD.

...!
Gott's Leetle Feesh in Trousers!