An update to this situation. While I have all the posts I can’t find an easy way to restore them.
It would be easier if I could just change a post’s author, but BBPress doesn’t allow for this.
The only way I can see is if I do the following.
1) Log in as your account
2) Recreate your posts
3) Change timestamps on your posts to match when they were originally posted
4) Hand the account back to you and you change your password.
This is FAR from best practise, but if there are posts you really need and you’re happy to do this, please let me know.