I found this stuff at my local tack shop and it made my horses SO shiny and glossy, I couldn't believe it.
I did definitely have to be careful about the saddle area and be sure to wash it off the next day so they don't get dirty, but I had no idea they could get quite that shiny! It's silicone free and it conditions. http://www.mysalino.com/mm5/merchant..._Code=CoatCare
I had some trouble finding it online but I found this link by looking up "show shine ultimate coat finish"