Looking for compatible WiFi extender

I have a network of only 1 adaptor ( PL 1000 v2) and 1 access point ( PLW 1000 v2 / NETGEAR14_EXTENDER ) bought about 3 years ago . I wish to extend with 2  new WIFI access points

On the market I cannot find the same model ; they are not sold alone (!) but with the adaptateur I do not need

• Are there some other access point models compatible with the one I have : same speed, 2 frequencies, WPS ?
• Where can I find in the documentation the process to charge the box password on all access points ?

Thank you.