It's a fair question.
Indeed, a lot of the cyberface makers are not active in the scene anymore. Pretty much gone forever. And I would think, even if they were active, they would be satisfied with a mention of credit.
I'm active in modding in the fifa/pro evolution soccer scene and I wouldn't see this as wrong in any way. You are not taking credit nor modifying someone's work slightly and taking credit. I see it as a simple re-release of their work, with all the credit going to them.
Up to you. But I distinguish re-releasing someone's work (with credit). You're simply making it easier to download. Nothing wrong with that.
Thanks again for the great roster work.