To the guards of the Originality shrine: please ignore this and/or forgive me!
But it might be useful for the more practical vintage riders:
the mudguards for the now very fancy cruiser bicycles fit perfectly on wheels with max. 3.00×21″ tires and come very near to the much desired “fast and skinny” look of rigid frame racers and sporting motorcycles of the 1930th.
A pair including stays costs around PSt 10.- with the choice of plated or black finished steel and nicely flared ends and is available from Ebay or you just ask the teenagers hanging around in your neighbourhood where they bought their ridiculously looking bicycles.
Anyone who knows a source for more than 8 cm wide in aluminium?