This is just a Quat cleaner (with a mild fragrance added, and possibly a small amount of a deodorant) and you can buy virtually the same thing for $4 a gallon at sams club. It's called Sanitizer, and it will have the word Quat listed in the ingredients.
Every janitorial supply store will have at least one Quat cleaner available.
For that matter, you can even use regular lysol or some kinds of Mr. Clean, look at the labels, there are many of them that are Quats.
Some have water soluble deodorizers in them, which can help with odors, but in the case of mold, aren't really what you want to do, as they don't really solve any problems.
Diluted bleach really works at least (if not better) as well as anything else, but is more caustic, so if it is going to be used on a regular basis, the quat cleaner is much less damaging.
All disinfectants rapidly lose there efficacy in the presence of organic contaminate. i.e. Clean the surface as much as possible prior to attempting to disinfect.