This is the lower track on my closet doors
Thanks for reaching out to us. I think we can help with this project, though the hardware we offer is a little different. Your exact track is unfortunately a discontinued model that, to my knowledge, isn't made anymore. However it seems designed to work with concave wheels, so with that in mind I think our 23-271 will work well.
There are a few concerns we should address before you buy anything. First and most importantly, we can't ship anything as long as 9'. Therefore the 59" long 23-271 is my top recommendation. What you can do is butt two of these together to make up the length of the original. This might add up to something a little longer than your original, but you can cut off the excess with a hacksaw.
The other concern is overall width. This ordinarily doesn't matter, but considering you're working with carpet then this may be something you want to be mindful of. Our 23-271 is 2-13/16" wide, as shown in the diagram below. If your track width ends up being a little over that, then you can expect the floor underneath to be exposed.
Aside from those two issues, I'm confident that the 23-271 will be perfectly functional for your application. It's just a matter of having to put in a little extra work to install them, and a potential aesthetic issue.
