What ever happened to the Belle Du Jour agency?

They are still around if u are referring to bdjnyc. They are on instagram

They are still around. There have been discussions on this.  

Kim is flaky, so sometimes she will reply to messages and sometimes she will not reply for days, if at all.  The website is a mess, with no real time schedule info since she seems to only send out things on WhatsApp, if at all.  
If you text for a schedule you may get a reply.
It also seems the Brazilian girls she hires don't want to come to Long Island. I have heard various reasons like the guys there are "cheap", and there is nothing to do there, but judging by reviews, it may be more of an attitude problem that the girls think they are supermodels and only want to work in Manhattan.
Good luck.