I would imagine the owner of the tack store could carry the product you are interested in - you could have them check with the Company.
These products I've told you about are made by Dr. Joseph Thomas - he has a Ph.D from MIT in medical research and has been a practitioner, teacher, and consultant in Chinese medicine for over 25 years and is deeply committed to his equine patients well being. I know the products are of the highest quality - I use them for my own horses and have had remarkable results! Sometimes a situation (as with my gelding's sarcoid)
Calls for something different than traditional treatment - I believe in the holistic theory - I can honestly say that I have seen the promised results and I could not be more pleased! I do want you to do your research and see if this is something that will work for your horse - I hope you find just the right supplement for your horse and I hope you will be as thrilled with it as I am with the products I use from For Love Of The Horse!