I need to scour every corner for illustrations I can safely use on my website
Salut! Live and, while hugely grateful to Roger Liptrot's folkimages.com , Bryan Ledgard and Alison Chapman McLean among others for permission to reproduce their photos, was delighted to come across the work of Jef Aerosol, whose many gifts include street art. His paintings of Christy Moore and
this one of Sandy Denny are good examples.

I hope that link works - it is to Flickr - but if not, go to http://flickr.com and use the search facility. He has websites, too, and Google should get you to him.