I have a Lance 975 with the pre-installed roof rack rails, but no crossbars. Where do I get the necessary parts for the crossbars, and what length crossbars do I need. The length from track to track is 93 inches.

I have a 2022 Lance 975 TC with an Onan QG 2500 LP generator. I am having issues with the generator shutting down on start up when the temperature I below about 45 degrees or so. The problem does not occur at warmer temperatures. After the auto shutdowns I am getting a code 45, which is a code for speed sense. This morning the temp is around 32°. I had to attempt starting it multiple times before it finally continued running. Each subsequent start temp results in the generator running a bit longer until the shut down with the same code. It seems to be that once the unit warms up it runs normally. Has anyone out there had this issue? If so, were you able to find a solution to rectify it, thank you in advance for your advice
David