Which items can hold an ioun stone? (non-pfs)

I swear I saw another "PF official" item besides the wayfinder that can hold an ioun stone.

Was I smoking crack?

Thanks.

Your body. They can be embedded in your flesh.

That's creepily awesome. I was thinking it was a separate item though, like the wayfinder, that can hold the stone and confer it's bonuses to you.

The luminiferous aether?

I don't see that in any books. Reference?

I don't know of any other items like that. Are you perhaps thinking of the questing stone spell, from Pathfinder Chronicles: Seekers of Secrets?

If you're "in the market" for features like this, we printed an arcane discovery in our Class Acts: Wizards product that (among other things) allows a wizard to use his or her bonded object in exactly the way that you're talking about. Have you perhaps (dare I hope!) seen or heard of this product?

There's also the ioun torch from the Advanced Player's Guide, but that's rather different.

It may have been what I was thinking about. I even went to check the accessory booklets from the 3.5 compatible days and couldn't find anything there. Oh well. Thanks guys!