HP DL380 Gen10 P - Adding Additional Drives

Hi Everyone, wondering if I could have some advice on a DL380 server.

I currently have a DL380 Gen10 Performance in production but it only has 8 SFF drive bays.

I'm in the process of building another server which is also a DL380 Gen10 but will require 16 SFF drive bays.
Does anyone know the part numbers to do this? I was also going to use a HPE Smart Array P816i-a SR Gen10 to handle the additional drives.

Thanks for your help!