Getting pictures of home furnishings is a doddle. Getting them pictured from above is hard work so I think your limited to the free art libraries or making them.

Sofas tho are really easy to make in a 3D app cos you don't have to be all that fussy with the dimensions and shape. Its unfortunate that there isn't a really easy 3D app other than sketchup. AFAIK, all of them that try to do a bit more go massively overboard.

Heres something I knocked up in a few minutes - could be better of course. You can tint it, and stretch the image (icon) to suite.