There is nothing that is suitable to replace an IL76, closest Western equivalent being Boeing C17.
The only way in which the IL76 will have a future in the western world is re-engining and more uptodate airframes.
Volga Dnepr are currently adding two "new" airframes to their fleet including being fitted with new Stage 4 turbofan engines.
The IL76 is a highly versatile, flexible and durable aircraft, tough as old boots. Just need to be less smoky, noisy and shake off the old/aged/poorly maintained reputation it has got itself.