Importing as an OBJ to create a morph should work, as long as you have not added or removed any vertices? Even adding or removing one vertex is enough to destroy the morph.
You can still do it from inside the Bridge.
Send Genesis over to Hex, select a poly in the middle of the eye somewhere (no need to be too accurate).
Use the Grow Selection using Shift ++, the Shift key and the plus on the numeric keypad. or select it from the Selection menu in Hex
Hold down the Shift key, and keep pressing ‘+’ until it stops doing anything.
Use the scale tool to enlarge it a bit, then send back to DS where a morph will be created for you.
See if that is any help?