just make sure you oreder one that is molded for your car with a rubberized backing. A lot of places sell carpets that aren't necessarily universal and are specific to makes and models but they are not molded and are crap. If you get an aftermarket one that is molded with the rubberized backing then you should be fine because they'll pop right in.
A long long time ago on my first car ( a cavalier
) I had to replace the carpet because it was in bad shape and moldy from a leaky heater... anyhow I ordered this piece of garbage that was specific to my car but wasn't molded. It came in a roll and was cut to the shape and size of my cab but I had to cut out the holes for certain things like the shifter and e brake etc... within a year it looked like garbage too.