you can make any moulding into picture frame moulding if you have a router or have use of one, by routing a groove along the ouside edge for the mirror to fit into.

otherwise find the biggest frames you can and cut the mirror to fit them

OR you could mount the mirror onto the wall with mirror clips and then just use mouldings around it to frame it in..if they don't fit tight to the wall use some 1/4 " or so material under it to shim it out from the wall

ronbre......I own a router & purchased a set of 50 bits for it(never used it before, I'm sure there's something in there that would work). So.....should I use a narrow strip of wood and paint it silver....? Or use a WIDE piece of wood(say 3" wide) and leave it natural, maybe use a clear lacquor finish? Then I'd just use mirror clips to hang it....not get a second one?