Did you think the jewellery section of the retail giant is not for a grimdark hobbyist like you? Think again! If you search for steampunk gears you may find top quality bits that can be purchased cheaply by the bagful.
Peter Jackson's crew made a great work portraying the Mines of Moria in their movies. If you want to see something eerie similar in real life, you can visit one of the original 12 Unesco World Heritage Sites, namely the Wieliczka salt mine near Krakow, Poland