HDX : Is it possible to add a CD cover Library

Hi,

I would like to know if it is possible to add extra CD Cover library (in addition to AMG and FreeDb) as there are plenty of my albums which do not have the righ cover.  I know that I can upload one by one cover by It would take too much time to do it as I have thousands of CDs.....

I ask the question because on Quobuz streaming sites, Covers are right ones, then I do not undestand why AMG and FreeDb are not up too date...

Many thanks.

Ps : I have done a CD lookup monitor upgrade several times with no better improvments.

Emmanuel.