Unfortunately, the bracket for the projectors can't be ordered separately. I've heard it may be possible to repair it; maybe someone on here remembers what product to use.
I used washers between the headlight bracket (not the metal welded to the car) and the housing. There are four screws holding the bracket to the housing, and a combination of washers can be used to get more adjustment out of both the vertical and horizontal aim. I also used washers between the headlight bracket and the car, but I believe these were more to control the gaps than adjust the aim.
Just be careful with the screws, as the housing is very brittle and it's very easy to strip out the screw holes or over-stress it:
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