I have heard of sprays to use on carpets to help with the dust mite from increasing or kill them(something like that). I have never used those stuffs before. I think the products can be found on allergy websites or some pharmacy and health stores.
umm... the only thing I can think of is type in allergy home products in a search engine you will find several places with products. I found that through my allergist, he gave me several diff. catalogs with allergy prevention products.may want to ask your allergist also.
dust mites 
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