I was at the LBS today and noticed one of the bars had a wide diameter top making it almost flat but still round. Asked them if it was the bars or if they did something different to achieve this. He showed me a scrap of the articulated plastic that covers the cable and might have told me what it was but I forgot. I have been looking for the past couple hours for something like this and have not been aable to find anything. I am sure someone has seen this and knows where I can find it. They didn't have any in stock, he used the last of it on the last build up.
Thanks for the responses, I figured it was somehting like that I just couldn't come up with the right name or description of it. I think that I might try to carve up some foam like one of the other posters mentioned in a thread that I found when searching for info on this. I have a battery/wire cutter from studio for foam that I haven't used since then.