1) At the end game area. It's like a town, but you will have to complete the last mission to have access every time you want access to that area. Beyond that, it's craftable. On a side note, I'm not 100% positive that the skin on that sword is the Katana skin, but I'm fairly sure it is.
2) I'd recommend checking GuildWiki for that information. They have a full listing.
http://gw.gamewikis.org/wiki/Main_Page
3) The first set of 1.5k armors are to be found in Kaineng Center, very early on in the game. There are additional crafters in that area outside of town that have different styles of 1.5k armor. After that, there are 1.5k Armor crafters on both Luxon and Kurzik sides, and later on still 15k varients of those armors. There are other 15k crafters as well, one of which is in that end game area I mentioned earlier.
Hope that helps