passive backplane wanted

One day I found someone throwing out an "Industrial Computer Source" SBC (look at http://www.icsadvent.com/ and search for "sb586t"). There was a passive backplane as well, but it was a 2 PCI 6 ISA slot backplane, which is kinda large. PICMG is the designation for the form factor. I searched, and found at least one company that sells a 2/1 slot backplane, but they're industrial, and wouldn't sell a single quantity. My hopes was to build a nice tiny box out of it. Given the form factor, it would be roughly the size of a shoebox. So, does anyone have a source for backplanes? I don't need any ISA slots, and would rather have just two PCI slots. I could take a dremmel to the existing backplane, but I would end up cutting off the headers for the power switch, etc, due to the way the backplane is constructed.