I had been looking for them as well, as they are unique to the phone and aren't exactly apps, but just shortcuts, so its easy to lose them and not get them back. Here are the homescreen icons
and these were in the same folder as well
If you have Astro, paste these into this directory:
/system/app/Browser.apk/res/drawable
I havent changed the file names so its exactly as it is in the folder. only problem is these are just the icons, if the bookmarks are gone, recreating one wont give you these icons so you'll need an app like bettercut or folder organizer lite to select your own icon for the bookmark shortcut.
Edit: I just noticed you have a Samsung Moment, found your post when I was googling the same topic. I have a Samsung Epic, so im not sure if these are the same Icons but I hope it helps you out