Do a google search and you will find some good deals..
Don't buy from the magpul website..
You can find cheaper deals if you shop around..
Just make sure you get the Carbine length kit...
I got mine for 50 Bucks a few months ago...
After a few searches it looks like they are around $73...
Magpul MOE Carbine Furniture Kit
Unfortunantely many are on BO...