every hid dealer will do that in laziness with the 9004/9007, but what i have done is specifically request in the notes that the connector be PREPINNED for 9007, its worked perfect 3 times now. Used to be a big PITA because i broke a couple of them when trying to swap pins.
DDM is a good company though, i remember a few years ago when they got big, they were considered the best HID for the money, and probably still are. Ive gotten friends several sets, even did a 9007 on my buddys mothers mustang 3 years ago and still works like brand new never had an issue or anything. And i think it was $80 or so for a bixenon kit.