I have, I bought the mount not knowing that it was only for manual trannys, and found out later on... but basically one day I was bored, so I went outside, took out the front motor mount, and tried to see if the poly mount would fit in there. (93 ex, auto)
What I had to do was, first, take out the motor mount (duh) then the top part of the mount has these two thin round rubber discs, that basically look like they're only there to keep dust out, well I just pulled them off. Then, because my mount was so badly broken, I just pulled out the middle piece of the mount (on the top part) and took a utility knife, and whittled away any rubber that was in the way when I tried to put in the poly mount. It was a total hack job, but the poly mount ended up fitting in there nice and snug... I actually left a little bit too much rubber in there, just to make sure the poly mount was nice and tight and had lots of contact surface. Put the whole thing back in, and voila, lots of vibration in the steering wheel, but better shifts.