i am trying to locate manufacturers for accelerometer and also in general drone parts. can someone name a few?
Unless you are buying many thousands of them the manufacturer may not do you much good. But do some google searches on invensense - http://www.invensense.com/ https://www.sparkfun.com/categories/160 They sell a lot of basic boards. You should be able to dig around and find places that sell each part. https://www.pololu.com/product/2470