My cover yellowed quite badly and I contacted Barker to find out how to purchase a new cover. They sent me one for free. I now usw 303 protectant on it.
Gene and DW Ginny 2008 Toyota 4Runner 4.7L V8 w/factory towing option
2002 Sunline Solaris Lite T2363 Reese Dual Cam Straight Line HP Sway Control
Proud member of the Sunline Club
I just bought a black vinyl cover for $10 at Camping World and covered mine. I can even operate the switches by feel through the cover.
BTW, Awesome cleaner from Walmart and the Dollar Tree takes the yellowing right off. Just spray and rinse. You'll see the yellowing melt away. Just keep it away from your wax. It melts away the wax too.
My TT came with that Lippert jack also. It lasted about 3 months and it broke. They replaced it on warranty. Now its out of warranty and I cross my fingers on every use. They are cheap. Why else would the Mfg. put them on. I'm sure I'll be looking at a Barker or something better soon.