Has anyone found a good source to download artwork?

I have a found a few sites for one at a time and manual selection but that will take forever. Also, I know the artwork is somewhere on the hard drive that Windows Media Player down loads but after a bunch of research I cannot find where the files are stored. I'm presuming there would be jpegs for each cover.
Online sources say they should be in the folder with the MP3 files, but not.

With only a few hundred, I plan to store the images on hidden pages versus retrieving on the fly which may be a little bit beyond my capability.

Any elightenment is appreciated.

Try themoviedb.org for what is generally called fanart or backdrops.

For cover art I use DVDprofiler. It is a $40 app that is a full library manager. When you buy a BR or DVD or CD you enter the UPC code from the package (you can enter title but UPC is most accurate and easiest). It then does all the work. All the cover art is stored in your application data area and you can export an xml file of your entire collection controlling what data is to be included (e.g. movie title, overview, cast etc.).

When you catalog (enter) a disk you can even enter where the disk was stored on a NAS so you can retrieve that and drive a player over IP to play the movie. You just need to upload an exported xml file to the pronto that gives movie name vs full path location on your storage system.

Thanks Barry.
While reserching DVDprofiler a bit I came across Collectorz.com that offers library cataloging software for moveis, music, books, comics...etc. It looked pretty good to me because it will scan MP3 files on your hard drive and catalog them including storing images and and thumnails in an "images" directory. Just what I wanted but, alas, there is some glitch when the image files are created. They are created in such a fashion that they are not visible in Windows Explorer. Very odd. If I can figure this out it will be good.

I also came across "Multiple Image Resizer .NET" that will batch process images and allow them to all be resized to a maximum value, %age, or other settings. It will also add borders, watermarks and other goodies. I tested it to resize the sample artwork that loaded with Collectorz Music Collector and it worked perfectly.

Thanks for the leads