The primary active ingredient is guar hydroxypropyl trimonium chloride. This is a very common ingredient but I’ve rarely seen it used as the primary active in a leave in spray. The third ingredient is xylitol which is a sugary substance that can bind moisture to hair and supposedly benefit the scalp.
I haven’t been able to find any other product that has this unique combination of ingredients. If you can find any other leave in spray with guar as the first ingredient, it might be close enough to be worth a try. Let me know if you find anything.