I seem to recall reading that Natuzzi have a very large range of product, but that they do not like to compete against themselves on price, preferring to place themselves at the premium end of the market. To aid this policy, I think that they make a point of not allowing two retailers in one area have the same products. If there is a sofa you like in Arnotts, it is likely the case that you will not be able to get it elsewhere.
BTW, I have certainly seen Natuzzi in a shop in Navan (Navan Design, I think)