need ideas on mounting scavenged lack shelves

"i have what I have identified as two lack shelving (light birch) units one long, one short that we lugged home after finding them on the curb. they did not have hardware and i am trying to find out how to mount them - any help would be appreciated. i am thinking sweged bolts into masonry walls." - beth

beth,
i'm assuming that they are the lack wall shelves. the original would have a concealed mounting hardware (a multi-pronged bracket that you fix to the wall and slot the shelves over the prongs). you can try checking with ikea whether you can buy just the mount, though i doubt it. if not, the stilig brackets may work to hold them up but they won't give you the floating shelf effect.

any other ideas?