I can't find my stock rom? Please help I need to flash stock rom on my dead samsung device but I can't find it, I attempted to remove the case but I don't know where sould I find it.

Here are some the phone info
Model found on settings : N5200 
Rom : 4.2.2 Jelly Bean
Processor in board: MediaTek ARM MT6572A

Found this unknown numbers and letters
Rated 5V = 2A
FCC ID: A3LGTP1000
Dual Core2 Tablet: N5200
V710-1-V710_bin_V04
SN:8145051101607  14E08025
SAMSUNG ----- 410
KMN5X000ZM B209
T V710-1-2G 
Thats All ! Thanks
There is no GT-N5200 or SM-N5200 produced by Samsung, and Samsung never produced MediaTek-based devices. Add the fact that the FCC ID is that of P1000 (Galaxy Tab 1st-gen), and it's obvious that your device is a fake copycat, and a poor example at that. Don't expect to find anything for it.