Seems there’s a big fad in scrap booking where you use acrylic panels for the front and back joined with a metal “O” or “D” ring.
Found an interesting site @ http://www.scrapbook-crazy.com/my-life-mini-album.html
Our course we know you’ll call us first, but if we’re a bit out of your way just look in the yellow pages for PLASTIC SHEET, ROD, TUBE or PLASTIC FABRICATOR and ask for a cut-to-size piece of acrylic that matches your needs. They can usually round the corners, bevel the edges, or flame polish the edges to a glass-like finish. You can usually pick from an assortment of colors and textures including a frosted surface (P95 or Crystal Ice) or an exotic edge that glows like neon.