The only method I have come up with is to extrude a thin pad in the area wanted. Should work fine as long as this area is not a critical stress area.
Extruding a small surface region for defining the area where the load is applied... that is the same I did.
But I can almost not wait for the possibility to apply the load on a small area respectively certain region.
Adding a very small amount of material is the best option. It will affect how that area is analyzed and you will need to take that into account when interpreting the results. Hopefully this area is not where the critical stresses would be expected.