If you want to purchase the actual raw flash chips you’ll have to make your way over to Taiwan, where there big names in NAND flash manufacture the chips. Apple brokered a few deals with Samsung to purchase something on the order of $500 million worth of NAND flash for their iPhone 3GS and iPhone 4 devices.

If you want preassembled flash drives you can contact a company like the one I work for, contact info below.

As for getting your hands on the die or a machine / process to produce NAND Flash silicon wafers you’ll need to put up hundreds of millions in R&D money or buy out a smaller manufacturer. Those big titans have their secret technologies and would presumably do pretty much anything to protect those secrets. So I highly doubt you’ll ever find any equipment for producing the chips floating around say on craigslist or ebay.

Good Luck and thank you for reading.

The company I work for is: http://www.usbmemorydirect.com we are a wholesaler of promotional usb flash drives and other marketing materials. You can reach a sales rep at 1-866-404-4645.

-Nick

Very clear explaination.
By the way, where I can buy those A or B grade Nand Flash Chip or die?

George