I replaced damaged pulley bolts with the new bolts that should have been used with my new inner cv gaiter( tri square head) although some cv bolts are hex(Allen key) .If you have jx engine with double pulley for power steering like mine that may be a possibility for you. Do however satisfy yourself the bolts are suitable/correct length/ suitable hardness and they won't come loose(I recall the original pulley bolts had what I believe is known as a flange style head ( maybe important to be so) and hex (Allen key) recess. Obviously the exact correct bolts would be the safest bet. By the way are you aware that the 4 bolt hole spacing are not equal ,meaning the pulley only fits in 1 position !
I noticed that there's only one position. My problem now is: which one are the original ones?
On http://www.oemepc.com" onclick="window.open(this.href);return false; I could identify the part numbers N 90348701 and N 90348704 (they look exactly the same, btw).