Powerbook headphone out broken - replacement possible?

Hey, its been going for a while now and finally the right channel of audio has fully cut out from the headphone jack. This is a huge bummer..

I mean the laptops 3 years old so its not to bad. I mean its taken a beating over the years. Its just that I use it to listen to music and audio out for watching dvds... so its no good for that anymore.. I have an external audio card but thats no good for when I am mobile and I use the laptop all over the place.

Is there a way to fix this or would it need a whole logic board replacement?

Can I use a audio card that fits into those card slots... on the left hand side of the Powerbook. What are those cards called again?

Let me know if you have any suggestions. Thanks, Andy.

Hey, I found this one:

Echo Indigo I/O

Buts its like £100! Plus it doesnt look very well made for some reason. I also dont like the way part of it sticks out from the laptop side. Looks like it will snap off for some reason.

Any suggestions? Andy.