This would be classified as abandonware if there was no other site on which the original mod author had an account which they could be contacted through. If the email has already been attempted, we would just need to know that due diligence has been done to confirm there's no other site where the mod author might still be active, and if not it could be uploaded--with all credit to the original author for the mod's base contents--as abandonware.
EDIT: SH provided me the name of the mod author and a link to the original download, and I am comfortable confirming its status as abandonware--we found no site where the user had been active any more recently than 2008.
The base mod can be uploaded, with all credit given specifically to Darth Leomar/Darth Betrayal. Your patch to the mod will need to be uploaded as an entirely separate mod, so both the original mod and your patch will be required to download.