Inspiron 15R 5520. new motherborad

Hi there!

Will you please help me to find where i can buy a new motherboard for my dell?

I've got a i3 on board.

I found some:

http://www.aliexpress.com/item/Free-Shipping-For-Dell-15R-5520-Laptop-Motherboard-Mainboard-QCL00-LA-8241P-Fully-Tested/1430180701.html

http://www.ebay.com/itm/Dell-Inspiron-5520-N5520-Intel-Motherboard-6D5DG-06D5DG-CN-06D5DG-LA-8241P-Test-/261484895157?pt=Motherboards&hash=item3ce1b6dbb5

http://www.ebay.com/itm/For-Dell-Inspiron-5520-N5520-Intel-Motherboard-6D5DG-06D5DG-CN-06D5DG-LA-8241P-/331163971570?pt=Motherboards&hash=item4d1ae92ff2

http://www.aliexpress.com/item/Laptop-Motherboard-6D5DG-06D5DG-for-DELL-INSPIRON-5520/1557442162.html

http://www.aliexpress.com/item/For-Dell-15R-5520-Laptop-Motherboard-Mainboard-0QCL00-QCL00-LA-8241P-100-tested-with-6months-warranty/1775879861.html

http://www.aliexpress.com/item/for-dell-inspiron-5520-laptop-system-board-06D5DG-6D5DG-mainboard-100-tested-working/1767889687.html

http://www.ebay.com/itm/Dell-Inspiron-5520-N5520-Intel-Motherboard-6D5DG-06D5DG-CN-06D5DG-LA-8241P-/251355257632?pt=Motherboards&hash=item3a85f0db20

But these are not new and have some different symbols

I've the following codes at stickers on my motherboard:

2886431304939

QCL00 D25

10K2

4619GP31L25

--

CN-06D5DG-12961-25J-236A   REV A01

MEN2040940G

28858639 03970 4319GP31L2    REV: K2    1220

And on the motherboard:

QCL00 LA-8241P