You can either use a premade layout, look through the site
affiliates and find a designer who will make you a layout (some of them have premade layouts on their sites, take requests, or work with you directly for a fee), or you can work on your post count and make a request on the forums. The first two options are going to be the quickest, though.
Also, welcome to cb

You should check out
the Guide, and then if you have any questions feel free to ask.