Unfortunately I didn't get your response in time to think about doing that. I did take a quick shot of the unmounted dually, but not sure if it shows enough to be helpful. Happily they look fairly new-ish, no signs of dry rot.
https://drive.google.com/file/d/0B6QOCDNwi-xselE0WGlmSGlCbk0/view?usp=sharing

Brad