ware abouts did you buy them from, struggling to get a match on those part numbers
Where are you looking?
I've just checked with a mate who works for VW and that part number for the rubstrip is correct.
In what way do you have to trim the rub strip? Does it still look like it's meant to be there or do you have to modify it massively?
I really like the look of it and if its only 45 sheets...But I'm guessing you'd be lucky to get it in the colour you want right? 
The US bumper is deeper than ours, you have to cut a small section out & plastic weld it back together.
It won't come painted, you'll have to do that yourself.