The Cervini spoiler arrived this afternoon - I ordered it Tuesday at around 4:00 PM, so that's pretty good.
BTW, Cervini lists it at 538 dollars right now - I bought it for 499 elsewhere online. It arrived well-protected in the unopened Cervini's box.
I've read the two pages of instructions - really straightforward, with pictures and also available as a PDF
at Cervini's site - and I inventoried the parts included.
So...I'm apparently missing a pair of set screws. They don't look like anything that's going to be a challenge to just pick up locally, so I'm going to go that route.
[UPDATE 8/24:] I went ahead and called Cervinis in NJ this morning and they're sending the set screws out FedEX this morning.
I took some pictures of it right out of the box: