NEW MOTHERBOARD FOR MY DELL INSPIRON XPS 9100

I NEED TO PURCHASE A NEW MOTHERBOARD FOR MY DELL XPS 9100 AS SOON AS POSSIBLE   MY SERVICE [Amin Note: Service Tag Edited per TOU policy]  ....GIVE THE INFORMATION ON HOW I CAN PURCHASE THIS AS SOON AS POSSIBLE     THANK YOU FOR THE TIME AND ATTENTION THIS DESERVES