Other carpet is available from Nontoxic Environments catalog. Generally use metal, glass, and real solid non-fragrant woods. If the wood has been 'finished' using customary toxic finishes, it can be sealed from outgassing with two coats of Hard Seal by AFM using a sponge or foam type paint brush. Do Not use gas. Full spectrum bulbs are best.
Gentle lighting is best as many chemically sensitive people are also light sensitive.
Do price compare different sources as they do vary. AFM has a complete line of building and maintenance products which are pretty safe for the chemically sensitive person. Avoid wall paper because of the glues. Any woods should be free of turpines, such as poplar. Redwood seems to be ok.