I'm under the impression that only the 57707AA and 57707AB are riveted on. Still don't understand why the other brackets are missing. I'm sure that it had been off or replaced at one stage anyway, the radiator support is slightly bent and i didn't do that. oh well.

As for the cable ties, i tore the bumper completely off whilst on a camping trip and had to cable tie it back on in order to get home. My bad

Just had a long chat to the parts guy at Subaru. We've sort of come to the conclusion that these brackets were discontinued for the 2002 Impreza.

He said he remembers them being on the Forresters and possibly others, but doesn't remember seeing one on a WRX. These diagrams are quite vague.

He's also confirmed that this part has been discontinued on their database, so i don't like my chances of finding it anyway haha.

Thanks all for your help, i think i may just about have it sorted now.

Adam