Alright...well, this question went over like a lead balloon.
I ended up just using the ones on my Ptolus CD. They say Ptolus on them and have cobblestones on them like the book cover.
I was originally thinking about some pre-made (something already in pdf so I don't have to make them myself via photoshop or something) bookmarks with pictures of dragons or monsters or heros on them or something.....
The Ptolus ones look good and do the job.
If anyone knows of any others...let me know.
If not, I'll let this thread decend into the darkened pit of nothingness.