Alright, I've found several so far and these are them. If anyone else finds more, please add them ^ _^. Some I don't have anything more than their location since I have since either forgotten what I got from it or lost it due to my companions not returning them when they get something better.
1) Schiavona Obtained: Just go back to the end of Blackdale (first entrance) and bind the 3 swords.
When you teleport to the sacred lands if you turn around theres a !? which asks "Do you want to bind the Remnant Ark?", i tried but it wouldn't work, maybe you need to get the rest of the remnants (I need Flachonelle) or do some specific side quests for it or it could just have no effect at all.
The Simarrionne is found in Blackdale by going to the right from the entrance and eventually you find it in a treasure point.
Anyone know what the Schiavona upgrades into? The customization guy mentions that he could turn it into something really special, but he didn't know how so obviously I'm just missing the weapon recipe for it.