Search for the word Elevated, and make sure the filter is set to search for pre-TRS2004 assets. It's an SP3 item, so it won't show up in the new more convenient system if you have the newer versions of Trainz registered.
That's another fine elevated track, but it's the complete system with the track and concrete pylons as a single bridge item. It's more modern than the track by Jjslll54.
A collection really needs both sets to be complete.