This was an auction done by senuser within the past year or two. It is a regular Metroplex, but it has prototype parts(specifically the loose/detachable antenna). I just got a Metroplex proto and I am missing this part. If the winner could I'm me, even if they don't want to sell the part that would be great. Here are some of the pics from the original auction.

Well the seller has been no help what so ever, hopeing someone here won this

I think this may be the person you are looking for, took me 3 hours to recall where I saw this thread:

tfw2005

Yah thats my thread of tfw2005. Those are some of the extra parts I got with the prototype.