The MSX Infocom releases
http://hol.abime.net/hol_search.php?..._conversion=21
are very likely unofficial.
I inquired about these some time ago here:
http://www.msx.org/forum/msx-talk/so...y-released-msx
Nothing came up suggesting that would suggest they were released commercially.
There are however many other official ports.
Here's a list of the
official C16/Plus4 ports for example.
I also made a thread concerning
Level 9 conversions that wasn't addressed, if anything is unclear, please ask and I'll elaborate.