If such a thing as a generic or universal footprint for a rf tuner, if can or rf modulator exists I have never seen one, even from philips, siel, thomson, sharp, .....
Always create a footprint for such specific devices.
If you are new to your EDA software then creating your own footprints is a skill you will need to develop anyway. So do both at the same time.
Using the manufacturers data sheet to create your SCH decal and PCB footprint you will gain experience on your software package AND get the footprints you want.
You will win both ways.
:R