The Runebooks are available at a couple places - I'd check CJ's Rune Library, NW of Britain moongate, Trammel, if you can't find a seller in Luna.
Luna is probably your best bet for the house add-ons, as well. IF you can't find the add-ons you need on vendors, you can always stand in Luna Bank, and when you see a person that is likely a crafter-type, yell out you're looking for certain items.
I've made stuff for several people in Luna, on request, when I saw them looking for a seller in the bank, and have seen others do it as well.