Narrowing findradius to an elipsoid cone

[Orion]

Hey, is it possible to make an entity scan for stuff in a elipsoidal cone?
I know it's possible to make it find stuff in a cone with its base as a perfect circle, which uses a function similat to infront(), using the cosine of a specified angle.

But what about elipsoidal cones? Like, they're wider up-down, but narrower left-right.

[Error]

look through the latest Gyro, it has cone shaped "forces"