Sorry, I did not intend my earlier comment as a chastisement, but more to raise awareness of the trap of using hardware RAID in small-scale settings. You're not the first one who has ended up in a bad situation like that, and I'm afraid you won't be the last one either. I was against comment length limit, so it ended up harsher than needed.
dmraid supports some vendor-specific RAID formats, but unfortunately 3ware RAID does not seem to be among them. Hardware RAID systems tend to use proprietary formats that are not publicly documented.
Have you considered contacting some professional data recovery specialists? This might be an easy case for them, if they happen to have the necessary knowledge/tools for that specific controller brand, as the disks themselves might be fine.
Sure, involving a professional will have its costs, but in this particular case, the cost might be very reasonable, and just asking for a price estimate certainly won't hurt.