In the old Quest Central for DB2 tool, when you right click on a tablespace and choose Create Like, you can enter the new tablespace name and the container file name would be $TSNAME.dbf. Once you click on the Build Script button, the container name will be automatically become the tablespaceName.dbf, eg. test.dbf.
In Toad, it doesn’t do that anymore. I would like to request that feature described above in Quest Central be added into TOAD for DB2.