Need advice about I2C 16x2 OLED

For my project I need I2C 16x2 OLED display (My Pro mini is out of pins - keypad+NRF2401).
I bought this display and got it working with this library. But this library has limited functions and hard to use. I would like to use standart LiquidCrustal_I2C library. In this russian site I found how to hook Winstar OLED with PCF8574controller, but I can’t find place where I could buy it.

Is there some options on Ebay I could get 100% working (work with arduino library).

Ps. My skills are “BEGINNER”…