Sean Hlousek had a similar request via GISCO today. I was able to download the 50 States DDV symbol files internally and share them out with him. Sean posted them to GitHub at the following address: https://github.com/VerdantSkys/DDVs_ALL
As Sean wrote -
"All credit goes to Jim Mossman http://www.jmossmanart.com/ddv/ddv.html
If you use these - you might go to that site and download them all. If you don't use these, or don't know what they are, you still might want to grab them and check them out. In my opinion, they give maps a real "local" feel and look sharp. (And they are fun).
Just wanted to share that they are available again. If someone has a better file hosting site, it would be a good idea to make them available somewhere else. "