OMC Cobra upper stern drive half

[BaylinerNN]

I am looking for an upper stern drive half for my OMC Cobra. The ratio is 21/21. I have an '87 Bayliner with a 2.3 Capri.
Was not a very pleasent holiday when the upper gear set pilled up.
If anyone knows where I can locate a used one, I would appreciate it.
Regards.