lol dominion patch

so the current lol client is:

1.41.34

and dominion client version is: 1.42.12

so my question is, it is possible to try to manual download it from their update server? or maybe manipulate lol client..

If you know the beta server details, yes.
otherwise, no...

If you get it to work , it'd be nice if you shared it with the rest of us !