Hello,
As far as I know, unfortunately there is no possible solution where you can keep the current sites configuration, policy etc. without upgrade the current server to SEPM 12.1.2.
The Articles you provided would surely need the same version of SEPM installed on the New Server either in Disaster Recovery method / Replication.
I would in this case suggest you to Install fresh SEPM 12.1.2 on the latest machine, run the SylinkReplacer to get all the clients reporting to the Latest SEPM and later create the same policies freshly.
Note: Importing the policies from the old SEPM 11.x to SEPM 12.1 would not properly work as there are lot of different policies in current SEPM 12.1
OR
Migrate.
Reason: SEP 11.x and SEP 12.1 RU2 has a lot of difference / changes in Database Schema, policies and features.
Hope that helps!!