It has come time to replace the bumper fillers on my '76 CDV and was wondering if anyone has done theirs recently and could answer a couple of questions. First, are the original flexible rubber ones available anywhere? If not, where can I find plastic ones that actually fit? I have heard the flexible ones are available, but I have not been able to find them. I have also heard that a lot of the plastic ones are hard to fit and usually do not look good. Thanks.