Determine if boarded any outbound ships (unlikely).

Search fenargh causeway. (unlikely- few legitimate threats on passage through to fenargh)

Check aedes- undercity complex (including scret passages). Corpse may be retrievable. Prevent necromancers from gaining access to it (that's gross).

Check with Fire/Stone giants. They may be willing to negotiate for the body.

Search deeping reach and various cave systems. Goblin and orc tribes likely will not notice the body.