This sort of thing has been going on for a while now. The only way to stop places like CRC is to stop all grey imports, as a lot of stuff they sell comes from this source. Not really possible.
Windwave (the UK importers of Marzocchi) refuse to honour the warranty of any fork bought from CRC as it's supplied from outside the UK (that's what the engraved serial numbers are for). Anyone who buys a fork from them will have to send it back to CRC for warranty work. A bit inconvenient to say the least, as the fork will be away for a minimum of a week.
The other thing to bear in mind is that grey import stuff is usually OE, which means that it was bought by a cycle manufacturer to fit to their bikes. These parts are usually, but not always, lower spec (in features and materials) than the after-market equivalent.
There's a good reason why some stuff is significantly cheaper than official imports.