I recommend using https://unsplash.com/
If you send me a request I can make a couple images too. If I publish them on steemit ( and you link back) and would be happy with steemit tips.
I have done this for @sirwinchester in the past.
You are a high quality contributor so I don't mind helping out.
Check out my posts for examples of my work.
Nice. Yup, recently (pretty much after mid year last year) I've been resorting to open-use images. Thanks for the offer! Do you have a repository?