https://www.syncros.com/ca/en/produc...d-cockpit-bars
https://www.cinelli-usa.com/cinelli-...ar-stem-combo/
Products ? Most Bike
https://www.trekbikes.com/ca/en_CA/e.../stem/p/12500/
https://us.ritcheylogic.com/us_en/wc...reem-handlebar
ALANERA dcr |Aerodynamic integrated stem and handlebar | Deda Elementi
https://www.giant-bicycles.com/int/g...ted-bar---stem

Synchros produces a few integrated, as well as Most, Cinelli, Bontrager, Ritchey, Deda, Giant and the other's mentioned. A good aero bar is 99$ of the way there IMO.

For example, I run this bar ( https://www.racycles.com/product/detail/9390 ) and if you combined it with this stem (https://www.cervelo.com/en/st-c026-cervelo-carbon-stem ) it would look pretty similar to an integrated.

You can't deny that on the right bike, integrated looks amazing and feels great to ride. Is it worth it? Up to you how you want to dress up your bike and what you'll enjoy.