I find official retailers continually frustrating.
Only the other day I was trying to find a particular item, and starting from the manufacturers site I visited the various official retailers. Many of them only carried a small part of the range (sods law means that would not be the part of the range I was interested in) and some of them didn't show anything by that manufacturer at all!
I eventually resorted to amazon and google shopping.
The links to retailers are only any good if the manufacturers actually look after them and check them, something which my experience shows is sadly lacking.