I'm pretty sure if you call Freightliner (1-800-FTL-HELP) they will sell and ship one to you. That way you're getting OEM equipment, and if you are a member of FCOC you get a discount.
I have found their parts and service (at Gaffney) cheaper than the dealers.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX