I'm in the market for an MCM lamp to set on a credenza, but one challenge I keep running into is finding lamps without shades or shades that are stained. Any tips on what to do about this? Go ahead and buy a vintage lamp and put a new shade on it? Can stained shades be cleaned? Are there good places online to find vintage or reproduction shades? I'm really hazy on MCM rules/best practices for lamp shades. Thanks in advance for any tips!