Turning while banking isn't as big of a deal doing it as it is in the classroom. IF you happen to be in a "fine piece of crap" such as a piper semenhole, you'll notice that you can do steep turns and do it just fine.... if you're in a conventional twin, i'd advice strongly against what I just said...
A Seminole is exactly what you called it. I have done a little bit of instruction in a Seminole, and what I ended up doing to actually make it appear the student has lost it is put both feet under one pedal, so they run out of rudder. Yeah, it hurts a little, but they will never see what it's like to actually loose it in one if you don't. And the difference between actually loosing it, and just recovering because of a horn going off is amazing. Just remember, breif, breif, breif. Then, before you depart, breif again! And then before the maneuver, say it one more time, "Loss of directional control, stall horn or buffet or any reason for safety of flight, the maneuver is over! And don't make me say 'MY CONTROLS!'"