Realise I am replying to this quite late but only just seen your request so hope it will still be of help. With you asking for classic coleslaw I will put that first but have also found you some variations too.
Classic coleslaw - 100g = 9 Syns
Tesco Healthy Living Coleslaw - 100g = 4.5 Syns
Weight Watchers Coleslaw - 80g = 2.5 Syns
Tesco Oaktree Estate Reduced Calorie Coleslaw - 100g = 4 Syns
Sainsbury's Be Good To Yourself Deli Style Coleslaw - 100g = 3.5 Syns
Morrisons Savers Coleslaw - 100g = 2.5 Syns
sorry I just see this I use white cabbage shredded grated carrot onion and I do syn some lighter than light mayonnaise mix it all together an its taste lovely (in my opinion) I have it a lot for lunch with just chicken or meat.