Can I get in 83" length?

Thanks for posting. I am afraid we do not carry a track like this in that length. However, you might be able to use our 71" 32-272 and 47" 23-270 Closet Tracks for concave rollers. You could adjoin these two tracks together, then cut off the excess length with a hacksaw like our 75-023A. Let me know if this option is something you want to explore.

Profile view of bottom concave roller track