2D and 3D drawings of aluminium components

I am looking for some 2D and 3D CAD drawings of components we supply within the structural landscaping and flat roofing sectors.
We sell a simple aluminium joist holder 17mm and 27mm high https://www.wallbarn.com/fire-rated/rail-holders/ which is used with an aluminium box rail either 15mm, 20mm or 25mm high https://www.wallbarn.com/substructure/box-rail/ which are used as a substructure system https://www.wallbarn.com/substructure/ultra-low-class-a-substructure-system/ for decking and paving.
We also have fixed height pads which are made from extruded aluminium https://www.wallbarn.com/fire-rated/fixed-height/ available in heights 10mm, 15mm and 20mm high.
We can send physical samples – so it is best that the author is UK based - we want to get a quote to draw up CADs for these 9 products.