Yes I know about Ron's Most Awesome Sternum Strap I.T.W. and I do appreciate the info.
"We had to wait for months and months while they built our order of the Most Awesome Sternum Strap In The World..."
"...the big brown truck guy delivered all the little guys in two 50lbs boxes."
Based on the above info from Ron's site I believe that they had them made and do not stock parts.
I ordered some items from ITW Nexus back when they were letting us order samples. I got the latching portion of the sliders but due to my mistake I failed to include the other side in the order. Also it seems that that these items have been "updated" and are either not being made anymore or are just hard to come by. I have done multiple internet searches.
I'm basically a MYOG guy and if it has to be I will order one of his sternum straps.
Edited to add that I just emailed Ron at MLD to see if he stocks the parts.;-)
Update: From Ron at MLD, "So sorry, but we never sell Diy parts."
So I'm still looking. Thanks anyway Ron for the quick response.