At the time I originally found the site of the artist that created them, I also downloaded a couple of header images (to go with the backgrounds), and by finding out the date I downloaded them to my computer, I was able to get a rough date for looking in the history. I checked for that date and "bingo!" there was the address that I'd been hunting high and low for... for days!!
I'm so happy that I managed to find the address and I've bookmarked it about a million times so that I don't lose it again, LOL!
On the off chance that I do, the address is: http://itkupilli-cutencool.blogspot.com/ very cool artwork, and all for use for free (which is by far my favourite price, hehe)