I have a machinist friend making armrest risers. They come in 3 heights, your choice of custom anodized color. They currently fit most Profile Design Aerobars. He's asking $30 per set, your choice of color and height. I can offer these at $20 as an introductory offer. Here's a picture of the one's I just received. They are 1" tall, anodized gold (yellow). At this price they do not include bolts. Shipping will be included in the $20 offer.
The small black part in the picture is the original Profile riser, as a comparision. The hole in the middle of the riser was cut out to save weight. We designed them with a curved front for aero dynamics. I didn't want a flat surface facing forward under the elbow pads : ) Sorry about the bad picture, but it was taken with my cellphone camera.