Does anyone know if there is anything out there on the net or in someone's possesion that will help with regards to parts suiting other drives in the same family?

I have a pair of 120g Diamondmax SATA drives and both appear to have failed heads.

Can i use heads from another drive or do i have to get specific with the parts for these?

Also how is this with all drives accross the board ??

Thanks
Minty.