I missed this topic or I would have chimed in earlier.
I bought my trim from JC Whitney, Mine, I pushed up over the edge but some place where the fiberglass was thick, I used a little contact cement on the backside to hold it in place. I had to get a little creative where the running boards and fenders come together but again, a little contact cement and a exact-o knife I got it to work out.
The link below will take you to the stuff I used. Had to order two rolls to cover from front center to rear of running board. Had a little left over and used it to trim the windwings. 
http://www.jcwhitney.com/autoparts/ProductDisplay/s-10101/p- 1156/c-10101