Add new CPL with CPL XWNB5602

Hi,

I got an installation with a duo of CPL XWNB5602.
One is connect to my box and other deployed Wifi far away in my house
In want to have Wifi in another place in my garden , i got electric connection and I want to buy another CPL to add in my installation
But I buy my CPL 7 years ago, can I buy just a CPL Wifi to add or I need to buy a package of three ?

Thk a lot