I'm sort of waiting until I graduate in a week to deal with this. This was a terrible time to rescue a boa.
I did contact my vet though, they don't do IBD tests or work with labs that do, however if I bring her in they'll take blood and package it for shipping properly, and I can send it wherever it needs to go.
I guess I'll figure that all out next week. I basically have an idea, I just need to make some phone calls and tie up the details, payment, etc.
What a mess.
Thank you everyone for your replies. Feel free to post anything else if it comes to you -- I want to learn as much about this as I can. There is a wild amount of misinformation/conflicting information on the subject flying around the web; I'm grateful that I have gotten some very helpful and solid replies on here.