If that system hosting the RAID 0 used a hardware controller, you're pretty much out of luck without paying big bucks. If the system is still in working order, and you can load the OS on it, then it's possible to recover the data.
Never EVER put important information on a RAID 0 array, EVER. RAID 0 is for performance, not data integrity. RAID 1 is much better for data reliability on the low end (when it comes to consumer PCs and users who are paranoid about their data).
If the system used a hardware based RAID controller (i.e. based on the motherboard) then the only way to get that array up and working again, though it isn't guaranteed, is to buy another board of the exact same type and setting up the RAID array again (usually the good controllers have a "recovery" option to rebuild arrays from busted controllers or an OS problem).