I would look myself but don't have BFV installed.
So basically you can't find the rockets that are fired from the huey in PoE, aye?
It has to be there, in PoE's objects.rfa. It might not have its own file, but might actually be in Objects\Vehicles\Air\
Common.con, this is usually where (in bf1942 at least) they put projectiles/weapons that will be used by many vehicles.
Are you sure you can't find the standardmesh as well?? Sometimes it can help to extract standardmesh.rfa and browse it like a folder, looking at a list in winRFA can be tedious..