I personally didn't have any conversation with him, as far as I know only Denis has sent an email. My info's just from looking through the wayback machine-- I don't want to bug Cheshire if others have already contacted him so if you want information straight from the cat's mouth you'll have to wait for Denis to post an update here, I guess. Sorry if that wasn't clear.
To restate my findings, physical copies of the game were being shipped on CD from mid-december 2003 until approximately mid-january 2004 (the end date is a bit fuzzier). The full version was seemingly never available for download online due to it being too large for the crappy bandwidths of 2003, so to find this thing it unfortunately appears we'd need to somehow track down a CD.