In the US, you can order an A1C at Walk In Lab. Pay the fee, print out the lab order and take it to the lab you chose when ordering. The lab will draw your blood and run the tests. In a couple of days, they will email your results. The whole process takes a few minutes to set up.
The A1C was cheaper than my insurance as well. Insurance would be $75 office visit plus a $40 lab copayment. I paid $26 through Walk In Lab.