Gyro Compass

[Nathan]

For top secret purposes this year we need a compass. Do to the fact that compass sensors that rely on the Earth's magnetic field are unreliable at best, we are looking for a compass that uses a gyro.

Now I know that such a compass exists, I remember finding one on the Internet but do to momentary stupidity did not bookmark it. I also know that we could "build" this ourselves by using a regular gyro sensor and an interrupt port, but would much rather buy a gyro that does all the math on board it's chip and just returns a 0-359.9 degree value.

Could anyone help me find this elusive chip?

Thanks a lot,
Nathan