I am looking to eqip a national fleet of 26000 buses with tachographs. Purachases will be made 500 at a time, and as emgineers are trained to fit them. I am looking for quotes for 100, 500, 1000, 10, 000, 20, 000, 30, 000 pieces. Mnagebaly, at a time, likley maximum 1, 000 pieces