I think the ones with the plastic are China knock-offs. Lot of the boot-leg Harleys getting in. The fins on the cylinders are also plastic, flip it with your finger and you can tell..

 

This is a link to a Street Glide Read Fascia on E-Bay http://compare.ebay.com/like/1811691...Types&var=sbar
.. It is Plastic and attaches to the stock metal fender ... It wouldn't be uncommon for you to experience some "flex" to a steel fender around the edges ... But ... As I and others have stated if it has a plastic fender on the rear it didn't come that way from H.D. ... Hope this helps.

 

Anxious now to get back over there and check it out again. Appreciate all the helpful replies. Will post what I find monday.