Personally I'd contact those involved with the mod and offer services of equal or great time value to those involved in making the mod I need.
That's basically a win-win solution when dealing with someone of your calibre. Either the mod is dead, in which case the mod gets used and you don't have to do anything, or the mod gets an injection of new life.
Agreed.
Sounds great, but what if time is the only limiting factor. Then it becomes kind of zero sum.
For example, if you were to offer equal or greater time (assuming that you even have the physical option of offering that), you might as well just re-make the asset myself (ie. Option 2), as in the long run there is absolutely no difference. In fact if you go with option 2 the entire community gets a new asset to play with at the end of everything instead of just one person getting access to something that for the rest of the community has no access to, for the equal time allotment!
Doesn't sound so win-win anymore does it? I mean, you could sure pay the lip service and say that you'll do something in return *later* in which case they have to trust you to actually do it - in which case there isn't really a gain for them, or to deny permission until the job is done - in which case there's no gain in it for you.
Of course, it doesn't necessarily have to be this way, but I still don't see it as the catch-all solution.