A year for a Yovra? Grab a brd and a rdm (or a dd/nin if you have one of the other 2) and trio Om'Yovra. Can kill 3 in 10 mins, 1 organ each in 30 mins. They're the easiest organ to get aside from xzomit (the other 100% drop organ).
It's like pulling teeth convincing people to go out and kill UFOs without an alliance. Even with and alliance full of people already up there after an event no one wants to farm UFOs... :/
edit
So I hooked up with this hardcore little taru and we farmed 20 Xzomit organs in the span of a couple hours, and while I was killing Hpemdes a couple awesome guys from my LS came up and duoed a UFO for me. ^^
Maybe I should screw myself over more often... <.<