I looked all over last night and I was able to find the complete set at several locations but could not find just the replacement sham. I even looked specifically for it. I tried ebay, amazon, just a general google search. Overstock and Smart bargains doesnt have that set in and don't have any shams alone either.

You COULD buy another set as a "spare" and then you'd have an extra sham? plus another set of sheets and another comcforter just in case hehe. I have actually done that =x