Oppo hive-mind, I have a seat question.

A while ago I got a pair of Momo Corse Acropolis seats from someone who I rallycrossed with. He gave me the seats, side brackets, some universal sliders, and some slider bars.

It seems like the bars don’t match the sliders though, and I can’t figure out where to buy just the slider bar. This is what the sliders look like:


Here’s what the bar looks like:


From what I can tell looking up, the bar is from a different type of slider. Any ideas? Links to buy just the bar?