HDMI to USB adapter(s)?
 

Hello.
I recently bought 2 more monitors for my laptop and I only have 1 HDMI and 1 VGA port on my laptop, and the HDMI is already used by an external monitor.
I am planning to have a 3 monitor setup, and I am looking for a HDMI to USB 3.0 adapter (it may have 2 ports, so I can connect both monitors, or it can be 2 adapters), the idea is having all 3 monitors working.
I have read a lot about supported resolutions, but I neee to have them in portrait mode, not landscape (all 3 of them).
I am using Linux Mint 18.3 which is a Debian distro.
I'm located in Romania, Europe, so if I can find somethint near me it would be the best so the delivery time is smaller.

Can you suggest an adapter I can use on Linux Mint for 2 more portrait mode monitors?
Thank you!