well I for one bought a river journal from this place...
https://www.facebook.com/pages/River-Song-Diary-Doctor-Who-replica-props/173468039423055?fref=ts
and its superb the ones she sell r over sized but I asked for mine to be correct size and provided specs and she done it.
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I must admit in the past I didn't like her versions as they were found to be oversized and wrong colour to the original on screen but I emailed her requirements and the new one I have is spot on