I like the look of this carbon gravel bar:

https://www.evanscycles.com/prime-cycling-orra-aero-carbon-gravel-handlebar-400mm-910062?gad_source=1&gad_campaignid=17510583505&gbraid=0AAAAA9YIkPTqq3STw-vfL_U7YdLfNZ_iv&gclid=EAIaIQobChMIwqLN8f-KjgMVtpRQBh1eJgUKEAQYAyABEgLXA_D_BwE#colcode=91006203

Have also seen it from condor cycles. Anyone know who makes them for prime?

I don't. But I agree it looks good 

Just noticed the date of the post... but Prime bars / stems are made by Controltech. Not sure what model the Orro is but the Primavera and Doyenne are Cougar models.