How to recover from missing translog-N.ckp files [ES-2.0.0]

Hi all, after a reboot on my ES server we start to got a lot of following error:

<IndexShardRecoveryException[failed to recovery from gateway]; nested: EngineCreationFailureException[failed to create engine]; nested: NoSuchFileException[/esdata/.../translog-113.ckp];/>

And more than 80% of existent shards are unassigned.

We're using ES version 2.0.0, one single node cluster, with ~400 indices and ~2000 shards.

I know that on ES version 5+ we have that "translog" tool to help, but it's not available on ES 2.0, so what can I do to solve this problem and get my shards working good again?

I'll appreciate any help.

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