You won't find better system than Simpleco - for your ute internal trades fitting.

Made in Germany, the Simpleco system is light in weight (side panels are made of fibreglass extrusion), strong in rigidity (crash tested) and can be customised through a range of SORTIMO cases / boxx / load securing system

Link to the Sortimo On-line shops

https://www.sortimo-shop.com.au/collections/simpleco-ute-racking