"Can a cisgender person get SRS or not, just curious?"
Nope.
Sex reassignment surgery (SRS) is but the last physical step of transition (aka "sex change"). Transition is a long, expensive, medically monitored process that takes YEARS to accomplish. Before on can even start the transition process they must be evaluated and diagnosed as being born transsexual. Without that you can't even start hormone replacement therapy (HRT), never mind SRS. In addition, even when a person is ready for SRS they need two additional letters of referral before they can obtain SRS.
The internationally recognized Standards of Care are the guideline all therapists, doctors, surgeons and patients follow:
http://www.wpath.org/site_page.cfm?pk_association_webpage_menu=1351&pk_association_webpage=3926
I guess you could find some back alley surgeon to do the surgery, but do really want to go there? Finally, any cisgender person who managed to do this would be at a very high risk of suicide when they've realized their mistake. They would essentially partially turned themselves into a transsexual person and they probably wouldn't be able to handle it well.
Transition is appropriate medical treatment for transsexual people and only transsexual people.
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參考: me-woman who was born transsexual (post-op)