ZFS recovery specialist wanted

At my sort-of work at the university, for a professor-emeritus, we recently had a disk disaster with a zfs raidz2 array on a FreeBSD 8.2-STABLE machine. Despite its supposed redundancy, there are (apparently only) 2 blocks with checksum errors, which prevent the storage pool from being mounted (imported).  Even import with rollback (losing a few seconds of transactions) doesn't work. And the former Sun has always been so proud of their reliable file system that they never saw the need to write recovery programs.                                       

Anyone who could take a look at it, or know someone? Of course... no budget... but you'd save years of work...