I have made sweet chilli sauce with glucose syrup and chilli paste. . You dont need much chilli paste as it is so strong about a small teaspoon and about half a cup of glucose syrup is enough mixed together into a small container. keep in the fridge.
The chilli paste/sauce comes in very small bottles and is available at asian stores, supermarkets or some fruit markets and has no sugar in it, but does have some garlic and ginger, which gives a nice flavour.
Enjoy!