Closed Beta for the exchange is happening now.
Here is the link if you want to join
https://docs.google.com/forms/d/e/1FAIpQLScvxBUbeXkP3Jx-hdZzu7RUCHmS_xFvA4iBlMNsmi0D9J5q9Q/viewform

Also they partnered with ExchangeListings,
check it out here.
https://medium.com/@DCORP/bullex-exchange-welcomes-exchangelisting-to-the-family-67f56ab5e6fe