10.8.2 is the lastest version full installer on the MAS.
Once new updates come out, Apple replace the full installer with the latest updates included.
Whay is happening, that it won't work for you?
Hardware that was working in 10.8.1 is no longer working in 10.8.2. I cannot roll back to 10.8.1
since I have no back up from that so I wanted to reinstall 10.8, but it is not available anywhere and I dont understand why.