Whilst there is no MSI available for Reader 10.1.1, you can get the MSI for Reader 10.1.0 from ftp://ftp.adobe.com/pub/adobe/reader/win/10.x/10.1.0/en_US/
The Reader 10.1.1 update is available from: http://ardownload.adobe.com/pub/adobe/reader/win/10.x/10.1.1/misc/Adbe RdrUpd1011.msp
To Deploy Reader 10.1.1, you can either:
1. Create an AIP for Reader 10.1.1 and deploy it across all the systems on your domain via GPO. This would require that you crate a new AIP for each update that is released and then push the same across your domain.
2. Push the MSI as it is across all the systems on your domain (via SCCM/SCUP or SMS) and then deploy the 10.1.1 update. You can do the same for any new update released by Adobe for Reader henceforth.
For mmore information on the same please refer to:
Hope this helps