This isn't the magnetic scale inhibitor thing again is it (magic electrons)? Or the ozone treatment that eliminates scale (it beams scale forming calcium carbonates to hyperspace)? Not again! Want to buy a perpetual motion machine?
I'm not sure if this thread began with a question, but water softening is a well developed science. Hot or cold lime softening, ion exchange (salt regenerated sodium zeolite or synthetic resin for softening, acid/causitc regeneration for "complete" deionization), membrane reverse osmosis, distillation, etc, come to mind. There are other processes, such as electrodialysis, etc...
Looks like you are on the rite track with process selection, and now you are just selecting supplier. You can check buyers guides for qualified equipment suppliers, etc... For small scale, maybe even the phone book; check their qualifications ... their experience, better business bureau record if you are really small scale? Watch out for tehnology claims supported only by testimonials.
If you are going for "zeolite softening", fine. It's likely small scale stuff. Reverse osmosis may be another option... energy intensive distillation, likely for very small (lab scale?) operations may be another opion.... or, like the magnetic pipe-wrap, i'd bet that nothing at all would work just as well (if you just wanted softening as an "insurance policy" against, say, downstream scale formation .. which may take much longer than 90-days to form!)
Good luck in your vendor selection.