Here is the case you need to get:

http://cgi.ebay.com/ws/eBayISAPI.dll...&category=3351

I have one I was lucky enough to get new, and I love it. It is not a rolling one but it is small enough that carrying it in your shoulder is not a big deal. I put in it one body, 2 backs, a 180, 50 and 80 mm lens, filters and a light meter. All fits in a case that is little bigger than a small lap top case.