You can try the same treatment on the eyes as you used on the head. Unfortunately it is not guaranteed to work on the eyes, as scaling and translations may be involved as well as morphs. But it is worth a try. If that does not work to fully restore the eyes, you may have to manually scale and translate them. In V4's eyes, I think the scale and translation dials are hidden. You can use Snarlygribbly's 'SceneFixer' to unhide the dials.

Morph injection packages should contain REM files to remove the morphs, but there may not be a separate REM for the head and eyes. If there are no REM files at all, then it sounds like a shoddy package to me.