Valve probably didn't sponsor that.
There are a few others TF2 items, check this out
Pyro's flamethrower:
Improvised Flamethrowerprobably based on the Ambassador:
Diplomat MagnumSpy disguise kits:
Staff Impersonation Kit (Blue) and
Staff Impersonation Kit (Red)This one has a + symbol, just like the Medic's healing effect:
T-1 Medical KitMedic's bonesaw (look at description)
Stainless Steel BonesawThere's also a shotgun, it may not be TF2 related, but the description says: "Give that guy trying to cap your intel a little ten-gauge hello!"
Defender Pump-actionChargin' Targe? Could be a coincidence
Regal Blue Foot Soldier's Rounder Shield and
Gore Red Foot Soldier's Rounder ShieldThere could be more, IDK