The portfolio binders themselves are fairly expensive if you want a professional looking one. You can go to Pearl Paint since you're right in edison to check out prices and different styles.
Also, I gotta throw a plug out there; I'll be doing some marble "posters" for Paul (HardcoreZ28 )'s cars. Instead of having a cardstock description poster, it will be engraved in marble with photo and description of the car. Click my Eastern Grafix banner to look at some photo's I've done, and shoot me a PM or email if your interested