Yep, in the last three years of rehabbing grills, I have noticed virtually all stores that sell weber grills drastically reduce their accessory and especially their replacement parts inventories. I think they were having trouble competing with online sellers and the vast availability of aftermarket parts at much cheaper prices.
Basically, I think they (brick and mortar stores) were getting tired of having to sell off all those parts and accessories at pennies on the dollar in September and October.