Hi Rob. "Use aftermarket parts from a manufacturer not just from a boxing company, So this is where things get even more confusing, because that must rule out buying from companies like:- Unipart. - Lucas as they are now, - Fuelparts, - Cargo. A.D.L, Woodauto. ETC.THESE companies even though they are not manufacturers, they sell good quality parts as a rule, but sometimes with some dross thrown in where they are struggling to meet demand. (this is where the problem starts).