Need help finding similar NAND Flash chips (photos included)

[Fliz]

Hi guys,
what I have here are photos of memory chips from different mp3 players. What I would like is to try to play by swopping this chips for same type but larger capacity and I need help finding them.
I can not order from DigiKey or Arrow because they do not deliver to my country but I might be able to get some from Mouser but I am hoping that I can stay on budget and try to find these in some other devices like solid state drives (SSDs) or graphics cards because I can get those cheaply in "non tested" condition.
First one is Samsung K9LBG08U1M TSOP48 NAND Flash memory chip with capacity of 4GB, what I would like is to find this type of chip but with 8, 16 or even 32GB (64GB if it exists), doesn't have to be from Samsung.
Second one Toshiba TH58NVG7D1DLA87, I was not able to find much about this one except this: NAND-56NM-16GX8-MLC-3.3V-ODP-LGA52 so 16GB NAND Flash chip in LGA52 package. Can we find this one in 32GB or maybe 64GB if it exists!

Any help is welcome.
Thanks

[amyk]

http://www1.futureelectronics.com/doc/SAMSUNG/K9F2G08U0B-PIB0.pdf
http://www.triton-prog.ru/Dnl/Nand_Toshiba_NEW.pdf

[Fliz]

Ok, so something is not clear, by the product code for this Samsung chip it says Density BG: 32G but I know device only shows 4GB as available and there is no version with 16GB or 32GB! (There is with 8GB thou).
What verison should I try to find if I want 32GB, K9L(EG/FG/HG)08U1M ?
And thanks for the part number decoder sheet for Toshiba chip. 

Edit: I tried googling TH58NVT0D1DLA87 (128GB), TH58NVG9D1DLA87 (64GB) and TH58NVG8D1DLA87 (32GB) and got 0 results for either of them 

[amyk]

Their size is specified in bits, not bytes.

Trying to synthesise your own part numbers is unlikely to be very successful since the manufacturers only produce specific configurations; e.g. parts with 2x or 4x the capacity as one may simply be a multi-die package (all pins commoned together except for a CE for each die.)