New external units on new maps

I think it would be interesting if some of the new maps were modeled after cities like Köln, which are quite close to other countries (for example, the Netherlands and Belgium) so that you could call in Dutch and Belgian units as reinforcements. I believe that German and Dutch units have almost the same gear overall (of course not the same manufacturer, but the same in functionality, though I am neither a Dutch paramedic, firefighter, or police officer, so don't take my word on this), so the only things that would have to be made from the ground up are the models.