you are certainly living in more easier regions with regard to wheel/ tire combinations but despite Germany is tough we don´t give up (actually not as bad as Switzerland).
Just got an old Peugeot/Talbot Germany confirmation for 205/60x13 on Minilite wheels. So first step is achieved now and all I need on top are some period pictures from the 70ies showing American racing wheels on either an Alpine or a Tiger. If anybody can send me I´ll include him in my evening prayer...