The Rabao NPC's name is Irmilant (I couldn't find this in BGwiki or FFXI wiki, so I posted it here). He requires 2 Light Crystas and 1 Ancient Lumber, as Techzardow said.
this rod obveusly breaks, otherwise you wouldn't be seeing this. lol
but should read
Limited lifetime warranted.
there is a cheap quest to get it fixed. and when you go to synth it yourself chances of breaking and loseing the broken rod are 0% :D