HI foxflower! I'm the person who emailed you on craigslist about this site and about the corrgugated plastic tubing. I'll try to take a picture of what Fujoe has done to the gate that we have. I was at this site:http://www.rabbit.org/chapters/san-..._digs.html
and partway down it says that rabbits can chew through plastic gates- that's why plastic isn't recommended. I really don't see any harm with wire- If you end of getting an x-pen, those are wire with paint coating on them- the same thing as the pet gates. I think that if your bunny really wanted to get into a room she would chew through the wood.
Also, look at a forum I started entitled "paint, plaster, oilbased clay..?" people gave me lots of tips on how to get fujoe to stop chewing.. granted, nothing worked for him so we just covered up the problem.
are your doors squared to put a pressure mounted gate on it? I live in Lakeview- in a building that's not rennovated, and nothing is squared.. there's no way that I could put a gate like that on my doors. I don't know where you are located, but everytime I go to the Unique thrift store at Kimball and Elston there are always pet/baby gates- there were two yesterday. Good luck and i'll try to find more info for you!