I usually handle these directly, but there's so many of them, and by so many different people it's getting tedious in the extreme.
The trick with 'conversions'/whatever is to FIRST seek consent.
Then, IF you get it you're free to do it. [distribute].
Posting that 'if you object let me know and I'll remove it' is NOT good enough.
If any of yours are there...let him know .... as politely as possible...that ALL of them have issues of copyright/consent.
I have posted about a dozen or so Policy Violations, and they'll take time to be dealt with, so please be patient with our Devart brethren....