The only barre training I could find on the IDEA site is this one:
which is a different organization.
Barre wrx seems to have a facebook page and a website that is not a .com or .org, but a wordpress site. There may be other sites, but that is all I could find. I wonder if that is why you are having some trouble finding it.
I think you might want to contact them directly either through this site or through their facebook page.
It is also possible you took an IDEA sponsored workshop that was led by someone from this group, in which case you should call the friendly people at IDEA… the number is at the top of the page. It does look like they do some workshops at conventions, I think I saw that they presented at DCAC at some point.