Are there any surgeons that have experience with inserting breast implants with air or gas/carbon dioxide?

I have never heard of this before and this type of procedure is not offered.  Only implants that are safe and on the market are saline or silicone implants.  I would advise consulting with a board certified surgeon before experimenting with non safe type surgeries.  Best of luck!

I don’t know anybody who fills an implant with any kind of gas.   if this were tried they would probably feel like balloons, very unnatural.   one person actually asked about filling them with helium in the hope that it would give the breasts a lift.   I don’t believe that would work either.

Dear Plasticlover7,
At the time, there are no such options. Options you do have are saline or silicone implants. Breast implant type and sizing selection is a complicated process and requires a detailed consultation that includes a discussion of your goals, a detailed examination, and a lengthy discussion. But the decision will always start and end with the patient. 
When it comes to sizing, we have all of our patients find 3 photos of their desired breast size. We ask for naked breast photos because clothing can obscure the true size (push up bras). Next, we consult with patients and go over the photos and take detailed breast measurements during a physical exam. Next, we using a sizing algorithm to determine a range of implants that will work based on the exam and the measurements.Lastly, during the operation, we use silicone sizers in the operating room to see how the size actually looks in the breast. We sit the patient up in the operating room, while asleep of course, and compare the sizer result with their desired look photos. If it is too small, we start the process over with a slightly larger implant. We don't stop until we get the perfect match.Of all of my breast augmentation patients, every one of them has been happy with their size due to this detailed and meticulous process. You don't want to invest time and money into a result that is either too big or too small.You should discuss your concerns with a board-certified plastic surgeon and make sure that your surgeon understands your goals.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery