I just puchased a 2006 Elantra GLS 4 Door and can't seem to find custom seat covers anywhere.

Does anyone know if these exist and where I can find them?

 

You can't. The seats have air bags on them, and putting seat covers on can affect their deployment; therefore no one wants to make covers for them. They could be sued if there is an accident and someone is injured or killed because the air bag did not deploy.

 

You can get custom seat covers that are airbag-safe from http://www.shearcomfort.com/

I've had great luck with them and my seat covers fit like a glove too =]