Electure:
Thanks for the link.
That is one of them, the rest are probably within the Arlington Cat.
I see a lot of different config.; vinyl siding, stone, clapboard, etc., but being 'without tools' I don't know the sources.
Here's another one; second row is for lap siding.
Edit to add this link:
http://www.specialliteproducts.com/lighting/accessories/lightblocks.aspx