Bifold door bottom track

Thanks for reaching out to us. It seems you spoke with someone from our company before, though I'm afraid I don't know what the context might have been. I only know what you share here with me.

Either way, we sell a variety of different bifold door tracks. The best replacements ultimately come down to the size of the profile and the design of the brackets that interact with the pins. I can't garner either detail from the photos provided, but it looks like the hardware in use is very similar to our 21-455. 

We don't sell this in 48" lengths, unfortunately, so it would have to be cut down. You can review its bracket design and size below.

Dimensions of the low profile track assembly.