spiked centre caps

hi ya thera all i have just recently bought my first vw, have liked them for years but finally took the plunge. i have bought a mark 1 golf and i am putting porsche teledials on it , the centre caps are missing so i was going to put spiked centre caps on but unfortunately i have tried everywhere and i can not find them anywhere.
was hoping somebody would no where to get them from , i could get them fabricated but sounds mega bucks.
many thanks neil