need help rewiring Sennheiser headphones

I have a pair of Sennheiser HD429 Stereo headphones that I would like rewired. I can purchase the new headphone cable and jack, but would like someone to do the rewiring.

Let me know if you would be willing to do this and have the necessary tools! It shouldn't take too long. I can pay you $20 and bake you something you like.

Thanks!