Doll bed headboard (for 12" doll)

My daughter needed a bed for one of her 12" dolls, which is quite long to be printed entirely on the printer. I have found a suitable piece of plywood (9 cm wide) and decided to make two headboards to be screwed to the edges of the wood piece. I tried to print it both upright and laying down to test which approach is better. It seems that turning it 90 degrees to lay it flat requires almost no support and the quality is better. I was looking for something like this model online but could not fin