When dealing with this problem I restore from the regular backups.
If there isn't regular backups, the data's probably not important. (Important data gets backed up, regularly.)
If the data needs to be recovered, and it's important and there's no backups, generally I fall back to two tools.
The first is DiskInternals RAID Recovery which can be used to determine the order of the disks in the RAID array.
Detecting the right type of an array is vital for correct recovery. Raid Recovery supports both manual and fully automatic detection of essential parameters such as type of array, type of RAID controller, stripe size, and disk order.
The second is R-Studio Network Edition. This allows you to create a "virtual RAID" out of the disks and access the data.
R-Studio doesn't find RAID parameters automatically, however.
Conveniently, the trial of RAID Recovery allows you to identify the RAID parameters.