They are sourced by Lippert.
Google "Lippert wire guides" and you will find them.
They come with the flat wire guide and some accessories that are typically obsolete, but you mainly want just the flexible plastic guide.
Fleetwood just uses tie wraps to secure the wiring harness to the perforated holes ( where they usually over time) on most of their coaches.
I've replaced mine and you can cut them down to the length you need for your coach.
Hope this helps.
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