defuzz, been out to have a look tonight and I presume the part you need is the one by the rear light cluster, if that is the case, then the part you are after is still on the wagon. Doesn't look too hard a job to get it off, just a case of removing the speaker and trim from the rear pillar, then it looks like there are 3 bolts holding it on.
If you wanted to PM me with your e.mail I can send you some pictures to make sure it's the right part.