You can buy Lv50 Artisan gear and tools from your GC quartermaster, or push on to Lv51 and purchase normal gear from the marketboard or Ishgard NPC vendor.

From memory, you should be able to craft the item now that you trade for Master Book 1, and that has instructions for the Master Book 2 item.

Or you can buy the first item off the marketboard, or acquire it from desynthesizing Lv50 dungeon gear (if you have the appropriate skill leveled).