Most 126s with steels are 14". Your best bet is either some ropey 15 holes (from a 126 only) or anything with a 5x112 stud pattern and offset lower than 20 should clear safely.
I've got 4 standard alloy sec rims from my 560. 2 are replicas, 2 are genuine all have had a coat of sliver paint but look good and will do for what you want. PM me if you are interested.