Hello, Rich! Thanks for reaching out to us.
We carry quite a few different wood bifold door tracks, but I'm not certain exactly what size you have here, or what pins are used in the door. Would it be possible to get that information? Note that when I say "size" here, I'm strictly referring to the width and height. You've already covered overall length.
As for seeing the pins, I would ideally like to see them out of the door ahead of time, but I basically just have to see as much of them as you can manage.
In the meantime, you can see our full list of wood bifold door tracks here. They're located towards the bottom of the page. You'll see that we carry several replacement kits, which include tracks, brackets, pins, and everything else. I'm probably going to end up recommending one of these, but what I'm trying to gauge right now is whether these will fit in the space available in your frame and whether the pins will be compatible with your door.