Garden stones (Ballymacarret BT4)

I'm trying to help a vulnerable friend out who has to sell their house but is on a tight budget,I've already bought the paint and will be doing the painting and gardening work for free. The front garden looks awfully and the stones need replaced,I was wondering if anyone would have enough stones to do the front garden of a small terraced house,the colour is irrelevant as long as there's enough to do,thanks for reading