Just tear open a PS1 and steal the one from inside it, wtf plays with it anymore anyway? You should be able to find generic ones all over the place. My concern would be actually fixing the problem instead of just giving it another ribbon to eat. Can you reroute it somewhere else, if you had a long enough one, or could you use something thicker maybe? Like slice up a strip of ATA133 cable and use it instead? It would be tougher.
Anyway, good luck.