General Nexus 4 4.2.1 factory image

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http://androidforums.com – I upgraded to Jellybean 4.2.2 not knowing my tether software wouldn't work any more (PDAnet). I need this for my work. I just rooted my Nexus 4 and tried it and other tether software again but know luck. So I am thinking I need to go back to 4.2.1 . It is know longer available on the Google site..... Does anyone have a backup of this that they could share with me. Or any other recommendations. Thank you for any assistance. (General)