US actually had T-80U, not from Korea, but accidentally from some state that didn't suppose to have em (even before SK goth them). But i doubt that it's real T-80U in Irwin. And this case has some reflection in the world media, while theres no single word about T-90. And i do not think that indians would sell it. My guess that your T-90 is T-72B (US should have some) made to look like T-90. What else should we expect from the guys, who make their own T-72, stuff it with explosives, and shoot ATGM in turret's flank...
Of T-72's right, not 80s and 90s (wtf?). Has some 80s, but not hundreds.
Probably you're not lying (even most likely, if you prefer). But:
a) Other people do
b) You still can be mistaken
T-80 were in Chechnya. about 100 tanks, she basic versions of the tank. It was there, ukranian-style autoloader was rejected as unrelyable.