It's worth asking DJI but I think this is beyond economic repair considering the new price has dropped a fair bit.
You still have good controller and battery(s) and the easily damaged camera/gimbal I guess.

I'd look at buying a drone only replacement.
Direct from DJI the Advanced is about $550
http://store.dji.com/category/phantom-spare-parts?from=menu_products
You might look for a lightly used one on ebay as a lot are being sold to get a Phantom 4.