With a cheap miterbox, glue and a length of molding from a big box hardware store, you can make a customized frame to any size in less than an hour. If you add a router to the mix, you can make your own molding from any pieces of wood you have laying around. For the glass, once I get a frame done, I just go down to the local window glass installer and he will cut me the right sized piece in about five minutes and generally it costs me a dollar or two.