Nez du Café is a collection of scent bottles similar to their wine series. Pinot, a member on these forums, sells the kits. Not cheap.
A cheaper option is to smell & taste as many different types of fresh fruit that you can get your hands on. I remember seeing a post a few months ago describing this (perhaps on these forums or elsewhere) and it makes alot of sense. The aromas of fruit are one of the most common descriptors of coffee tastes, also toasted nuts and grass/hay. Ive yet to come across a bean that smelt of durian though (and thank god for that!!). The taste is not so bad, but I cant get over the aroma which is nightmarish and doesnt allow me to appreciate the flavour of the fruit.:o ;D :P
Richard Sterling, as quoted in The Travelling Curmudgeon, says: "... its odor is best described as pig-shit, turpentine and onions, garnished with a gym sock"
p.s. Where are you located? You should pin yourself on the member map