I grabbed this photo from a thread on the Replica Prop Forum. Although it focuses on the HL-10, the thread also has some photos of other lifting bodies and X-Planes. I have seen a lot of them, but many were new to me. It's well worth wading through. I also need to see what else is on that forum.
A reader has commented that this photo shows the X-24A separating from NB-008. See his comment below for more info.