Walmart, your local auto parts place,
Jegs auto,
Rock Auto. Just a few places to Check,
Keep in mind the cab seats are more than likely Jayco, not Chev.
Edit add
CampingWorldKen
2006 Winnebago Outlook 29B E-450.
2012 Honda CR-V AWD
Blue Ox Aventa LX tow bar and Brake Buddy Vantage.