[Crossroadsonline]

I'm looking for a live chat mod to add to my store so we can communicate with customers while one of us is around (meaning we need the option to have it turn off when no one is around to answer questions.

I found Kayako, but the price seems a bit steep. I thought there might be a plugin or module for x-cart that can achieve this? If so can someone point me in the right direction? Thanks