Manufacturers do not make a single compass IC that converts the readings for human use (it's not profitable because it is too specific and there are far too many types of visual interfaces to accomodate for). In addition, with electronic compasses you need to know which way is down. They all need additional hardware around them to do this and output a visual display.
A gimballed magnetic ball realy is the cheapest solution for this...or a pre-made car electronic compass.