remodelled and made a great model from @Meistel Edel (thx!) parametric, so any size can be easily created
any width/height
any number of holes
the plate is 3.2mm thick
Variations:
exported few most common variations for convenient usage
see Blender file for other params
Print info:
4 perimeters - so almost whole body is made of perimeters
brim
it is not mostly, but to be sure and especially for high and not wide hinges, add brim
50% infill (there is not much of it with 4 perimeters)
Assembly:
❗❕ on 1st look it may look like impossible to bend, but try to bend it slowly on one side and back, repeatidly and after a while it should work nicely.
if the side is short, it may be really difficult, youc an try also to cut small inner hinge supports with razor sharp