Where did you get this information of the 70 hours limit? Is it school based or US-law?
I know about Hillsboro, HAI and Heliflight providing J-1 Visas. Are there any further? Heliflight is mentioning at their website that there are 4 in the US.
Is there a way to get a J-1 at a still 200 h cpl level?
regards ...