All that is needed is one replicable experiment that proves LENR...
To the best extent of my current knowledge no one has even attempted to replicate Cardone, Stringham and Claytor, or Ohmasa. Cardone et al, however, have stated that their work started as replication or confirmation of Russian experimental works that found of anomalies in cavitation experiments.
I myself am, in this very moment (admittedly very slowly given my personal constraints of time and resources as owner and main engineer of a small irrigation engineering and contracting company, in a small city of a wannabe developed but still third world country), gearing to replicate work based on cavitation, with the aim of partially replicating or at least creating an analogue to Ohmasa’s transmutations, but with a first stepping stone of replication of Lu et al transmutation of K into Ca in the presence of hydrides with ultrasonic stirring.
This based on my pure curiosity and pursue of the truth. Why would a company that created a whole industry out of previously inexistant services not dare explore this new area? For them the cost is peanuts, and they stand to win the world if they find this to be truth.