Yes, there is source; I gave it a go, but it gives an error somewhere (it may be due to its double dependency on HDF/4, HDF5. I pondered about it and realized that there is no huge benefit to compile from source, at least AFAIK, so that's why it's binary. 

Next week, we will be having the hackathon right near the climate scientists that care about this, so we can ask them details.