One other source ... an archive of moodledata/filedir/ ... but only if you made course backups. Those course backups (.mbz files) if you didn't save them to an alt directory, are in moodledata/filedir/.
Your options (numbers):
1. you could probably do with a localhost install of moodle ... key of course would be determining version of moodle you were running. A virtualbox install of an OS would give you license to tinker ... a lot ... and fail without cost (cept your time).
2. while one could restore a table from an sql, it's probably a compatibility issue ... old table with new moodle version. So am gonna say no .. forget that one. Besides ... multiple tables ... some for question type ... some for x, some for y, some for ... not just one.
3. kinda the same as #2 ... multiple tables
Rather than guessing a lot ... how about you restore the .sql you have and see what's there?
'SoS', Ken