Don't require the replication to be successful. Failure to replicate a result is just as valuable as successfully replicating a result.
Why go through all the work of actually proving/disproving the experiment when you can just change tweak the numbers of the original experiment, say you actually reproduced the experiment, and then move on?
And get a nice $100k too for close to zero effort!
(Having in mind: "plus another $100,000 which you could use to publish a replication")