Well, theres a another way to get 2012, but, its only the studio version,
The website i found it on also has the 2013 client, if ya willing to go extra.
here: http://www.mediafire.com/file/5kk2as5b76cx2f5/ROBLOX_2008-2013.zip/file
the "early 2013" client in my folders has the 2012 sky even tho in retrostudio "early 2013" has 2013 sky
