Persistent Ghost Touch?

[dnjscott]

Is there way for a martial-type character to have a persistent ghost touch? I feel like somewhere in the library there is a feat / archetype / ki power that does this and I'm not just remembering.

[The_Scourge]

Tetori monks get to grapple Ghosts at 17th level for 1 ki/round

You could always just get an Amulet of Mighty Fists with ghost touch on it

[Movin]

Barbarians can get so angry they punch ghosts with the Ghost Rager rage power. Any time they are raging they can punch ghosts.
Lvl 6 req.

Can't think of much else that just out and gives you ghost touch though.

[Malag]

You have ghost salts which can be applied to weapons for 1 attack if it helps.