Houzz is the new way to design your home.
Natori Queen Quilted Duvet Cover, 92" x 96" - $299.90
Also from Horchow - Jane Wilman Catherine's Palace - Sheets only, though. Can't find them.
Jane Wilner Designs Lattice-Textured King Duvet Cover, 102" x 86" - $1,100
Sheets and pillowcases - love them.