I have a few carbon racing/drop style handlebars for sale. These are all super light and save nearly 100g over standard bars. They have 31.8mm stem clamp diameter and are generally short reach and shallow drop. They are all labeled as 44cm width, but vary from 42-46 depending on measurement of outside to outside or center to center.
Profile Design Canta Aero Carbon - Brand new with flat and aero top, gloss paint and factory drilled for internal cable routing. Can also be set up with cables routed external for simpler access and maintenance. These measure as a true 44. $129 Others I have seen listed as new are $300+
Easton EC70SL short and shallow- THis one is new but not in original packaging. It has traditional style bend and flat areas on front and bottom near the center to keep cable routing tidy. This has a mat/satin finish. This bar is very light at 210 grams. It measures around 42.5cm c-c on the front of the drop where the brake levers mount. $89
Aerus full carbon bar - used in excellent condition with some tape residue and rubs and scuffs from levers, stem, computer, and light mounts. Glossy clear coat with mottled carbon finish. Measures out at 43cm. $68
I also have a few pair of aluminum alloy bars that are like new/new-take off condition - Ritchey WCS and Zipp Service Course short and shallow. Ritchey is a deeper drop. Both are 44cm (Zipp measures 43) and 31.8 Clamp. I will post these in a separate ad.