If you are near a craft store and have acess to silicone sealant, it should be pretty easy. You'll want to buy plastic canvas - the kind one might use for needlepoint - in a color of your choosing and, for better re-enforcement, you could also use the binding strips used to hold on plastic report covers (I can't remember the name of the dang things). What's nice is the divider won't slide around like with the clamps on store bought ones, you can trim the canvas so the top touches the hood to prevent jumping, and you can slide just the plastic canvas out for cleaning instead of having to dis-assemble the whole divider.
Here is a pic of a VERY well done one from another forum; hopefully she doesn't mind that I'm linking to her photobucket account, since I'm not supposed to give links to competing forums.