I recently bought a NOS recirc heater that came with all the bits. For those looking to install one I have loaded up pictures, installation directions and templates (PM me if you want them) and measurements.

The ground wire for the switch is 16" long.
The positive wire is 36" long.
PS duct hose is 19" long.
DS duct hose is 27" long.
Heater hoses are 53" long.
The decal is also a water transfer type not a stick on as most vendors sell.

PN for this GMC heater is 2233243.

Link to pics is here there are several:
http://community.webshots.com/photo/2778425910102454676BIkVKV