Ummmm....That's more difficult.
There is an ASrock: http://www.asrock.com/mb/overview.asp?Model=X58
As you can see, if you have a graphic card which needs 2 slots, you must install it at the last row (be sure that your case has room enough. If it fits in only one slot, no problem.
Anyway, I don't like ASrock..., but you won't find mobo from a first line brand with 3xPCI.
It's decent enough. It can be bought.