You may not have any options... BUT... it may also be possible that only unimportant data at the end of the file was truncated... this is JUST A GUESS, but perhaps you could try adding bytes to the end of the file using some kind of binary editor, and repeatedly try to start the database. Make a backup file copy of the .db file first, so you can start everything over again if desired. Then start by padding it to the next 2K boundary, then add 2K chunks (the most likely block size). Or use 1K boundary and chunks.
The probability of that working is very low... but not necessarily zero : )
If it works, then you may be able to rescue some of your data.