I just told our designer to start making up some banners in those sizes. We make up promotional material in any sizes, all anyone has to do is ask. ) You can check our site in a couple of days and they will be there.
Blue_Spade, I sent you an ICQ message
If anyone else needs anything, let me know and we will get right on it. We have an in house designer that is there for specifically this reason, to give webmasters what they want!!