Hi benerlandson,
Subject to confirming that any retailer or manufacturer on the list you wish to deal with is completely transparent about the materials and components in their mattresses (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Onalaska/La Crosse, WI areas are listed in post #3 here. I just updated the list today.
Phoenix