This is the Ikea item.
LANSA
Handle, stainless steel
Length: 13 5/8 " / 345 mm
Width: 1/2 " / 13 mm
Depth: 1 5/8 " / 41 mm
Article Number: 401.387.60
They come in several sizes and comes in pairs. Makes sure to get the one above if you want to use it for the Elektron boxes.
Total cost for the stand is about $14.
Yes the pics are with A4 and Octatrack on top of the “Ikea hack” stands.