norb:
Dan ,more and more dealers will not now give out part numbers to customers who then go to independents to cross reference it on to the OE manufacturers part number which will be cheaper …The dealer will check and give you a price but most now will not give you the dealer part number …
You can get most of the manufacturers parts catalogues, like DAF rapido online for very little so probably can’t stop the tide. Answer really is going to be to sharpen their pencils on price. Granted pattern parts are often not OEM quality but OEM quality isn’t enough to justify quadruple the price.
Bit of a case of once bitten twice shy as well if you can often find dealers trying to wriggle out of parts warranties when that was what you paid the premium for.