How to use a portable display with an older Macbook 2011 (USB 2.0)
There is a reason for the USB-C / USB 3.0 requirement, and I think it is power (among other factors).

The specifications of those monitors mention 7.5 and 8 Watt. If I understand the USB wiki correctly, USB 2.0 can at most give you 2.5 W (0.5A x 5V), which is not sufficient for your situation.

So even if you find a cable that can physically connect you MacBook to the screen, it will probably not work.