chilli sauce recipe for kebab?

Does anyone have one?
I'd be happy to use up some syns on a really tasty one or buy a shop bought one if there's one anyone can recommend?
I've never found one that's anything like what you get at the takeaway.... I've often thought the sweet chilli sauce would be spot on if it wasn't sweet!

I use a tin of chopped tomatoes, add 2 cloves of crushed garlic and 2-3 finely chopped chilli's. I add the seeds from 2 of the chilli's (depends how hot you like your chilli sauce), and wizz up for about 30 seconds with a hand blender. Syn free. It keeps ok in the fridge for a few days aswell.