Given how critical this mod is to onra's work, I agree that would make sense if Iliana is OK with it. The readme file doesn't state Iliana's wishes with respect to uploads of the mod to other sites or modifications to the mod. It doesn't preclude it, but it also doesn't explicitly authorize it either.
I sent a PM about the Dune Gate issue some time ago and I don't believe it's been read, suggesting Iliana isn't visiting the forums at this point. So if you have an alternate contact you might want to try that. Otherwise, I would think it probably comes down to making a best effort to get permission and then making a judgment about the most appropriate course of action in the absence of a response. If the mod truly is abandoned I would hope Iliana wouldn't have a problem with onra doing a bug fix release and maintaining a reliable download location.