A while ago there were Refined Pure Steels, Refined Pure Plates, Refined Threads and Refined Handles at Tiger Totem Exchanger for 10,000 Silver Coins each.
They were a huge help to newbies. They appear to be gone now, after the latest update. I think they were removed to make room for those promotion books.
Any way they can be added back? If the NPC is full, then add them to the New Material Exchanger in Seville Port.
Check out various tools for VCO at The Pirate's Cove: