I'm pretty sure if you Google search carbon track bike you will get a lot of different results. I know Aventon used to make one before they started to only make Ebikes.

Here is the other one I was thinking of.
"Stradalli SL-16 Full Carbon Green Track Bike Fixie Complete Bicycle. Ultimate Power Wheelset." https://stradalli.com/stradalli-sl-16-full-carbon-track-bike-fixie-complete-bicycle-ultimate-power-wheelset.html