Are you open to keeping WeatherTech/Husky products in there as an option? There are also deep pile mats available, I think JC Whitney may in fact carry them if you prefer that.
Which also reminds me: there are now car interior products from the likes of CarPro, Duragloss, etc. that will treat your carpet and keep it clean/make it easy to clean. Folex is a preferred carpet cleaning product for professional detailers. A good steam cleaning + a "seal" will take you a long way.