The question of the availability of HB1Ac in rural areas is very complex but it should start from a general health system strengthening point. Because we need the technology ( the tests, electrical power) and technique (personnel who can perform the tests and report rightly. Rapid tests for Hb1Ac will be ab option too.
You may have read this article already, but here is the URL for an article that compares A1C point of care instruments: Article Selecting an A1C Point-of-Care Instrument
As has been noted by Daniel Kwakye Nomah, this is a complex question for multiple reasons. The context in which you are looking to enable A1C testing is also an important consideration (for example, is this about how to enable testing in healthcare facilities or for community-based programs?).