I think Poloniex is the best shot. But it needs to reach requested minimum tradevolume otherwise it gets delisted like Bittrex once did.
To get there many members should make this request with motivation:
https://poloniex.com/coinRequest

Write them that CBX is solid and has been around steadily since 2013 and whatever good you can think of.

How can I get a coin listed on Poloniex?

You can submit your request using our Coin Request Form.

Poloniex reviews coin submissions and makes decisions based on several criteria. Where applicable, a coin must have:
A block explorer
A website
A unique genesis block
A compiled wallet

We also conduct a thorough code review before a coin is added on our exchange. In addition, we like to see evidence of the developers' dedication to the project, community interest, and above all else, innovation. If you feel your coin is truly innovative, we want to hear about it. Poloniex never requests payments to list coins.