Gears & Axles - I am looking for a used axle for a '99 SS

Title pretty much tells it all. My Camaro needs some rear end work and the shop tells me one of the axles needs to be replaced as well. If you have one PM me or just reply. Thanks.

You have a PM.

Is it a 3 or 4 channel axle?

I do not know what that means, what is the difference between a 3 of 4 channel axle?

3 channel is abs
4 channel is abs and traction control