Yes they are. Ya got a good eye! They are available on the DLS in about a dozen variations. Look for David Snow (DES).
John
Dave snow also has some genset locos too (also on the dls). Heck he has tons of locos there, most are reskinnable too (maybe all are). He just asks you to ask him first before you upload any reskins (he has a freeware thread on the forums you can post a screenshot to for that)