There seems to be some potential bootlegs of this making the rounds on a certain website which shall remain nameless. I can personally trace the lineage back to the source so there is no doubt where this one originates.
However, this now appears to be a 'legitimate' bootleg, an unauthorized copy from within the ES camp. Stay tuned.
Even with all the Echospace reissues upon reissues this one has remained elusive and is still out of print in any format and there is yet another layer of this that needs uncovered.
This one is an exclusive to HTCIS - FLAC.