Hi
I think there is a local store called tesco,where you can get all items for reasonable cost.Even i used to get nappies for my child there its all cost around 6.5 euros for 35 pads,i will always go for tesco brand nappies which is comparitively cheap.Also,you can get giant size pack if you want to buy in bulk.I hope this would help you.Give me a shout if you have any queries.
Good luck