Does anyone know the SRID for an equal area projection that is suitable for Finland?
You could try ESRI:102013 it is the Europe Equal Albers Area. Kind of like the USGS albers projection but for Europe. I would be concerned than Finland is on the geographic fringes and actually into the polar regions and this is better suited for mid-latitude Europe.
An non-ESRI definition appears to exist. EPSG:3035.