@BenSAFC 

Hi,

You can go to TP-Link's Powerline product webpage and filter for the devices that have the features you need.

https://www.tp-link.com/en/home-networking/powerline/?filterby=5793%7C5794%7C5795%2CAND%7C6282

Make sure whatever adapter you buy is compatible with the HomePlug (AV/AV2) standard, because that is what your existing TL-PA4010P uses.

Any TP-Link Powerline adapter that has the letters "WPA" in its model name supports Wi-Fi.

As other users have noted before, in certain countries TP-Link does not sell single Powerline adapters, but only the KIT's consisting of two or more units. You will need to check yourself what is available at your location.