First place to start is the DLS. There are E8A's and E9A's there (and I think B units, too). I thought that I'd seen some Wabash E7's recently on a third party site, but when I went to the site I thought they were at, I couldn't find them. A now retired member of the comunity, Landrvr made E7's, according to archived posts from the forums. If I understand the forum posts correctly, if you can find someone who has them, you can obtain them from the user who has them.
ns