Microcontrollers with built in HID support
The ATTiny85 doesn't support USB. You can bitbang USB using the V-USB library. Kind of a hack, but it does work. An ATMega328 (used on the UNO) can do the same thing. So the ATMega328 would be an option too (if the ATTiny85 is).

The ATMega32u4 does support USB natively, so this might be better. The ATMega32u4 is the MCU used on the Arduino Leonardo and the Arduino MICRO. Those might be available where you live.

You can also use a regular Arduino UNO. As on the UNO there is also a ATMega16u2 that does the usb-to-serial. You can reprogram this ATMega16u2 to also act as a keyboard. Like in this project