Yes, there are counterfeit products out there. Incidentally, it's made easier when manufacturers use stock containers - containers which can be bought from stock in low quantities - as most containers from manufacturers are - you can see for yourselves how the same containers are used by different companies. We took another approach (originally because we just wanted to create our own unique image, but now we see other benefits) and have containers - which could be copied if you have a significant amount of money to make a die, or you manage to find our manufacturer and then buy very high quantities - beyond what most counterfeiters are willing to invest.
However, it's nearly impossible to stop grey imports (i.e. CND/EZ Flow or other products bought in the USA and imported to the UK, or the trick used in some low cost salons where they refill containers from known manufacturers with unbranded product). Personally, I doubt there is much of a price advantage when you also pay shipping and import duty - perhaps if you buy a lot. But then one has to ask, why doesn't that customer spend the same energy trying to move upmarket and earning more per hour than saving a few cents on product. Some people, frankly are stupid, they focus on irrelevant detail and miss the big picture.
And while yes, there is a factory in the UK that produces good quality L&P and gel (and sells under their own brand which is well respected), however their minimum order requirements are way too high for most salons. If you have a chain of salons and are willing to use unbranded product - it could be a solution - but most salons claiming to buy direct are actually buying from wholesalers who are supplying product to dentists i.e. MMA products!
Bob