Here some extra info about quickpar. You need 13 repair blocks.
Let's analyze the structure of the PAR2 filenames:
nn is the total number of blocks of all preceding files.
mm is the number of blocks in this file.
So, we have to download a couple of extra PAR2 files and we need to make sure that the sum of the numbers behind the '+'-sign is 13 or higher.
So download all the files until pa1-9.vol11+08.PAR2
See also: http://www.binaries4all.com/quickpar/repair.php