I found the british store modeltown.co.uk , which offers building kits, made out of ressin. It is unpainted, but it is weather proof. I ordered it already in october and received it just two weeks after. Finally in january I had the time to glue and paint it. Today I put in on my railway for the very first time.

It perfectly fits into the landscape! I love these british building kits! Way better than the plastic kits.