and am wanting to know of a suitable place to go here in Chch to get some stainless steel sheet (2-3mm thick) so I can cut the rack and widen it by about 400mm. Will need to get the sheeting bent to shape a little ("L" shaped with a slight curve and roling over the top a little or even done in two sections, one over the top and one up from the bottom), then I will pop rivet it to the frame. Something like this....
I will also need to find another suitable length of Ali to go length wise in the base of the rack too.