If the RAID set is broken, yet you can read the data, your best option is to copy off what you can/need.
The only way I know to get a broken RAID 0 set back working is to set it up as new - which means the existing data is going to be erased.
RAID 0 is all about speed and performance - there is NO data redundancy... Depending on how your RAID controller and RAID 0 set was created, you may only lose files split across the drives (JBOD mode). If your RAID 0 was in Striped mode, you will probably need pay for something like rtools.