There are no official modification parts that are offered by Samsung. Unfortunately, I don't know of anyone who sells such a product. If you are going to raise the television up, you might consider putting something sturdy under the base that the base will fully sit on.
The soundbar comes with a clear plastic foot that allows the speaked to stand in front of the TV. The only problem I have is that the speaker blocks the remote sensor on the TV so you have to lift the remote up and point in the area of the TV to get the TV to respond. Is there any way to modify the TV base with taller rubber feet or a taller crystal plastic center mount that connects the TV to the base? Useing wooden blocks or something similar would really detract from the sleekness and beauty of the TV.