You can try to re-establish the array. If the array hasn't been degraded too far, you can simply set the controller for a striped array, plug the 2 drives in, and it may re-establish the array. Have done it many times. But, if the array has been broken long enough for someone to notice the drives showing up as 2 seperate drives, and repartition 1 of them, I really doubt it.
Are you sure that the partiton was not there before the drives were put into RAID?
Anyhow, good luck.