Carrera does not offer buildings for 1/43° circuits, so finding a grandstand is a failure. Fortunately the 3D printer can help us.
On thingiverse, I found a very simple grandstand. ( https://www.thingiverse.com/thing:3404328 ) Intended for 1/32°, I corrected the scale before printing. However this grandstand is a little small and the benches too flexible.
So I decided to create my own stand inspired by another nice looking stand. ( https://www.thingiverse.com/thing:3463157 ) The roof is a little more advanced.
I made a first plan in 2D taking care to have the maximum of flat elements on one side, this facilitates printing. The benches are in L to ensure a minimum of rigidity. Two models were studied in 2D, a small stand and a large one.
Now that the dimensions are validated, the elements are modeled in 3D with FreeCAD.
Export the elements in STL format to prepare the printing file.
Printing the elements
Assembly
The assembly is relatively simple, you just have to put the benches and the roof by putting glue dots at the junctions of the elements.
The end of the roof can accommodate an advertisement as well as the lower part of the bleacher. For a better rendering, it would be necessary to put 3 aligned bleachers. It will be necessary to call on the printer again.
Assembled weight: 155g. At about 20 euros per kilo of PLA filament, this comes to 3.2 euros per stand.
In order to fill my stand for cheap, I found on Ali Express a batch of 50 painted seated figurines for 6 euros with shipping.
https://fr.aliexpress.com/item/33035792924.html
The scale is 1/50 and not 1/43° but visually it does not shock..