ABS Flange Issue

[JJC]

Need Help! I replaced my bathroom floor and found that the existing flange was to high. I used an inside pipe cutter to remove the existing flange thinking that I would simply be able to attach a new flange. My major oversight was not factoring in that the existing flange was an outside fit over an 3" ABS pipe. So I'm left with the 3" pipe with a section of the old flange on the outside of it (OD 4", ID 3") - see pic. I've read from previous posts that a flange that fits inside a 3" pipe is not a good idea. Any other suggestions?

I'd prefer not to have to rip up a section of my new floor, and I cannot access the pipe from the room below.
http://lh4.ggpht.com/_c7CQ99VXk48/Sanno0mT1uI/AAAAAAAAAC8/7Q5KJG6sLCk/s288/flange.jpg

[hj]

A plumber might try to carefully peel that piece off the pipe riser, but I am not sure if that would be a good idea for you to try.