evening people,as a newbie im building my tools up as they are expensive and couldnt afford the lot at once,,im looking for a 120mm hole cutter for toilet waste pipe hole cutting,,i have been using the montolit dry range of cutters on an angle grinder and have a few diff sizes of these they are ace to work with,,now i notice rubi do a whole pack bit set with the 120mm cutter but this pack is out my price range does anyone know who or where would sell the 120mm cutter on its own? any help would be much appreciated,thanks