Is there a place I could just buy the saline injection for breasts? Can I do the injections myself?

Even a doctor or surgeon would have second thoughts doing such thing to himself/herself.Be a patient, let doctors do their expertise. 

Saline is easily available at many pharmacies. However, injecting saline in the breast will only give very temporary enlargement. In the US, saline implants are purchased by physicians, surgery centers, or hospitals, and not by individuals.