Guide from top of thirty-five year old bifold door

Unfortunately, we don't have a guide like what you show here. The only thing we have that's similar is something like our 23-266 , but the plunger itself is very different from yours. You may want to consider a new replacement kit, which we show at the bottom of this page .

If your opening is ~59", then you should consider our 5' long 23-506 track kit for wood bifold doors. I cannot guarantee that this will work for you, but it's the only replacement kit we have for an opening in this size. 

The major difference is the hardware used. I have more experience with the one I recommended, which is why it was my first thought, but either one is worth considering. It's up to you.