Da Vinci makes 46(!) sf syrup flavors, including some fruit-flavored ones (peach included). You can see all their flavors on their website: http://www.davincigourmet.com/products/sugar_free_flavored_syrups/
However, their website is one of the more expensive places to buy their syrups. There are other websites that have them cheaper (especially in terms of shipping) and the cheapest way to buy them is often from TJ Maxx, Homegoods, and/or Marshall's brick-and-mortar stores. However, those stores don't always have them and usually don't have a big selection of flavors (I'm not sure I've ever seen any of the fruit-flavored syrups there). I haven't checked them in a while, but you might check Netrition.com -- they used to have a good price for them and a flat-rate shipping cost of about $6 or $7, which, when you're talking about a bunch of heavy syrup bottles, is a great deal!
Good luck on your search and let us know if you find what you're looking for!
Laura