I dont think so, you part is made for your case ... a 3.5 slot adapter may give you almost all the plugs you need, but as you wrote the power switch and or reset wont be there unless you add them
Had the same problem with my antec twelve hundred, had to strongly insist to have a new part under warranty, the computer was prone to reset many time, the bad bracket was the problem (flimsy reset switch), resolved with a new one, but i think they took it on a new case ...