[EricH]

I've been looking at Section 10 of the Manual for the last couple of years. Yes, it is a FedEx envelope.
Yes, it was listed in the 2008 and 2009 Manuals.
No, it is not listed in the 2010 Manual. (It should be, if it's with the KOP.)

However: Section 4 of the 2010 Manual says that you will get this with the KOP.

4.7.1 says:

• Teams will receive their BILLS OF LADING with the Kit of Parts in January. The BILLS OF LADING will be packaged in a FedEx Express envelope with your team number on the front. Once your team signs off on their Kit of Parts receipt, YOU are responsible for keeping track of your BILLS OF LADING.
• Treat your BILLS OF LADING like gold! The FedEx donation can save your team several hundred dollars on shipping your robot. FIRST will not provide replacement BILLS OF LADING for teams that lose, forget or otherwise fail to properly use their shipping paperwork.

At this point, talk to whoever was in charge of the handout at your event. You should have gotten it; they'll hopefully be able to remember if an envelope or two was forgotten. If it wasn't, follow the trail of the envelope: Who went to the kickoff in whose vehicle? Do they remember placing it anywhere (hopefully not on top of the vehicle...)? Did anyone see it in the shop? Who else has access to the shop? All those questions can help narrow the area to tear apart.