Actually about any method to recover or refine gold, you will be dealing with toxic methods, some are less toxic than others, but there are dangers in most any process, including anything you will find from a company like Shor that took common methods, renamed them, changed the names of common chemicals, and sell it as some special gadget.
Just about anything to do with recovery and refining you can learn here on the forum, safety and safe practices are discussed, secrets of this art that have been held secret from the common man throughout the history of precious metals are openly discussed and available for the common man to learn.
Even if you are for some reason stuck on trying the operations of the Shor systems you can learn to buy your own chemicals at fair market prices, and build your own gadget (if it is nothing more than a plastic tub, a few handfuls or rock salt, a porous cup and a battery charger for a power supply), but as you learn more about how precious metals are recovered or refined you will most likely want to use other methods, and as you learn more of how to work with these dangerous fumes, acids, and toxins safely, you will learn how these dangerous procedures can be done in a relatively safe manner, using safe practices, and using equipment to help keep you safer like the use of the fume hood in the laboratory.
This is a skill, science and art, that takes quite a bit of study to learn, and the forum can make it fairly easy to learn if a man is willing to study.
Even If you decide not to dissolve metals in acids, or melt the metals, there is many things, a person can learn about gold or the precious metals that will help him with most any business dealing with these metals, even if that business is only buying or selling, He can learn better the value of the metals, how to test the metals, and how to get the most from his metals. just about anything to do with precious metals you can learn on the forum.
Spend a little time reading through the forum, and decide if this is what you want to do. If it is you can study and learn to do it safely, it does take time to learn, and this is not something you will learn in a few days, months, or years, this is something you can study a lifetime and never learn everything there is about the subject.
Welcome to the forum the best university in the world discussing precious metals, and recovery and refining of those metals.