I found a site via Google that had an archive of many of the older one. There were a few corrupt ones that wouldn't fully load (and I don't recall which ones) but you should be able to find them out there.
I'll look on my system and see if I still have them.
Does anyone have issues of TWIC 899 through 919? (Preferably PGN but maybe I can convert from other formats.) When their website moved they just "forgot" about the archives and I used to sync only yearly, so I missed all the issues from the beginning of 2012 to the time of the move