Here's where I got mine. I had originally bought the glass, hoping to remount it to the LCD. No such luck, it's fused and would require tools and experience I didn't have.
Ebay.com
Seller: om.technology ( 103 )
Item title Price
Shipping price
Qty Item total
Original New iMac 21.5" LCD Screen LG LM215WF3(SD)(D1) ( item: 231212481637 transaction: 1028623781013 )
Paid on May-16-14 $268.00 $52.00 1 $268.00
Expedited Shipping from outside US
Estimated delivery: Tue. May. 20 - Fri. May. 23
Subtotal $268.00
Shipping and handling $52.00
Total $320.00