I have had these problems with Dubmeister too, I waited 3 months for the wheels, over 5 months for the locking nuts and flush fit valves, and I waited so long for a Victor steering wheel, that I ended up buying JV's alloy boss and wheel.
His stuff is rare and does make a car look the mutts nuts, but he will keep putting you off and have you hanging around, blaming everything from the company to exporters to the delivery van. If they are that bad then maybe he should consider changing them, as they are costing him business!!
Such a shame when I think he probably has some of the best choice of after market styling products for any VW