Given that PGN files are just plain text, then you can create your own.
From wikipedia you need 7 tags:
PGN data for archival storage is required to provide seven bracketed fields, referred to as "tags"...:
- Event
- Site
- Date: the starting date of the game, in YYYY.MM.DD form. ?? is used for unknown values
- Round
- White: the player of the white pieces, in Lastname, Firstname format.
- Black: the player of the black pieces, same format as White.
- Result: the result of the game. This can only have four possible values: 1-0 (White won), 0-1 (Black won), 1/2-1/2 (Draw), or * (other, e.g., the game is ongoing).
An example might be:
[Event "QGA: Main line with 7.Bd3"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Me"]
[Black "The other guy"]
[Result "*"]
- d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bd3 *