That would be the holy grail. That and a Wonder Card distro ROM.
EDIT: Topic was started when theSLAYER moved posts discussing 10 ANIV carts after a couple members mentioned they had some and would be willing to share the generation algorithm (the thing a lot of people here actually want, myself included) but not the actual ROMs.
EDIT 2: Considering the scope of this topic has expanded beyond 10ANNIV/10 ANIV research, I decided to rename it.
When I was given the 10ANNIV rom 3 1/2 years ago, the person who gave it to me asked me not to give it out or anything to preserve the cart's value. The same goes for a few others. Some of the stuff isn't even private, there just hasn't been anyone who has really cared, as far as I knew. Like this for example:
It's an unreleased gen 3 event, METEOR Jirachi. I found its multiboot rom in.. some game. I've told people about it and given out archives, but nobody really seemed to