I had this same thought last week, I was going to do an amber bulb until I could find $150 to do the halo matching fogs from Oracle. The JDP amber bulbs are about 90 bucks, so I opted just to wait. Was a lot pricier than I estimaed. I also have a 2013 2LT RS in ashen, hope you're enjoying yours as much as I'm enjoying mine (which means you hate your DRL's haha)
Here are the links I was given.
Plasma
http://www.jdpmotorsports.com/oracle...ro-ss-p13wplaz
SMD
http://www.jdpmotorsports.com/oracle...ro-ss-3607-001