I use these for hiding power strips and power supplies: https://www.amazon.com/gp/product/B07GR75F42/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

I use these to keep runs of cable together, and they come with a pack of velcro ties!:
https://www.amazon.com/gp/product/B01GCS77TU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Since you can cut the foam to any length, it ends up looking pretty good!