Moto-Lita 15" Wheel Horn Button
 

Does anyone know if the 356A enamel Porsche Crest horn button will fit within and be compatible with this steering wheel? The steering wheel has a 3-1/2in. center opening.

It currently has a plastic horn button with a small crest in the middle that fits within the opening and can simply be pried out. I am looking to upgrade the horn button to a more period correct look.

Any help would be appreciated. Thanks

Mercedes C5