Try Coast RV Center, 28404 Roadside Dr.in Agoura Hills, 818-889-8889.
Carolyn and Larry are the owners and usually in the Parts & Supplies Building. Road Bear is on the same property.
If they don't have the trim piece you need, you can describe it to them and they will find it for you. Sometimes they seem to leave you waiting but they have a pretty busy place and when it's your turn, it is your turn and no one else's, they are very attentive.
Stephen, I was surprised that you are a new member, I've seen a post or two from you in the past. There is a section where you will find help posting pictures. It is Technology Corner. I use the Imgur method and it is great.
