I have not had any difficulty personally because the stuff doesn't get anywhere near this house. And I hope that there are others here who can share their stories with you. But it sounds like you need a lot of personal stories in order to make something happen. And I hope I don't break any rules by mentioning this. However, you may want to try to get in touch with Melissa Kaplan. Her website is
www.anapsid.org. She wrote "Iguanas for Dummies". I was on a yahoo group called "IguanaMail" or something awhile back....and I saw a number of posts on there written by Melissa Kaplan. I'm thinking that if you get in touch with her, she could probably get you directly in touch with people who she knows have had issues. And I'm sorry for the loss of your iguana.