Mercruiser with no teeth

[triple]

My Alpha 1 packed it in last week. The teeth on the upper housing are toothless. Does anyone know where I can get parts or a used replacement cheap??

It's an Alpha 1 drive and 3.0L 4 cylinder.

 

[6Mile]

This may help.

http://www.boatmotors.com/motorparts/

http://www.stemtostern.com/stern-drives/mercruiser/alpha-i.cfm?gclid=CJuBuOzy6ZsCFQEhDQodmCEO5w

http://www.sterndrive.info/sterndriveparts/