Sadly I am afraid that anyone who restores motorcycles will find that from time to time you will come across dealers selling inferior parts, but you should always complain directly with the supplier if possible. You will not always get a satisfactory result but then at least you will have tried and you can then decide not to use them again. Over the years I have had push rods that were too short, valve adjusters that were too soft, magneto brushes that were too soft, the wrong wheel rims spokes that were too long, poor quality head gaskets the list could go on and on. All of the above were from british suppliers. The only one that I did not get a satisfactory result from was the push rods the company even though I contacted the then director just told me that they had been making them from 1976 and had no complaints and if not satisfied I should return them to the dealer and buy push rods from another source. They would not admit that they were too short even though I sent them back to them with an original push rod for comparison. In regard to labeling if it says made in the UK and it is proved that it is not then to me that is fraud and the company involved should be prosecuted, the problem is who is going to pay for the prosecution.