Kevin, have you tried Adventure RV over in Dartmouth? Their shop seems small but they have been around for a while. Usually places like this have a lot of stuff stuck away in the rafters!
Here is a link to the Coast Catalogue
with pictures of various awning
trims. Adventure should be able to get this item from them if they don't have it in stock. Some dealers are hesatant to stock this type of item because they need to buy it 200 ft at a time, but many of the shops that have been in business over 25 years have accumulated this type of item over the years.
Here is a list of a couple of other dealers
that could carry these products
This really is an item that is best to avoid shipping if possible, it's pretty pricey to pack and ship and risk of damage is also higher.