I busted the flange bolts when taking my exhaust off as well and drove around town for a few days with just the headers. It makes every other sound the car has ever made seem virtually silent. I ended up having the exhaust shop just do a 3in. straight SS pipe all the way back with a single glass-pack where the resonator was. I get compliments all the time about how it's the best sounding e46 they've ever heard, and I think the whole re-welding flange and straight back was roughly $100. Might be worth doing something similar a shot given the price point and see how you like it.