The best possible way to get the 2.0 update is to buy it. It will be the latest update and guaranteed to be almost bug free. However, what I did was search this up in Google: iPod Touch 5a347 2.0 Firmware. It's just the firmware build, but if you're knowledgeable enough you can scroll through the pages and find some useful material. Note: No links have been provided. No rules broken. Just a search term.