Hi...new to forum and soon to be new to RVing as I am in the process of purchasing a 2014 Heartland travel trailer. I've been doing research in advance of taking possession of the trailer and noticed that new versions of the unit that I am buying has small vertical plastic bars top and bottom of each side of the slide. The purpose of these plastic bars, I understand, is to catch the seal on the way out and insure that the seals are properly positioned to prevent water ingress; which seems to me to be a response to problems some owners may have experienced previously. Since the 2014 model does not have these, I was wondering if there is someplace online where I could order them so that I can install them on the unit I am purchasing.