Hi,
If you get confirmation the boa had IBD then I would really advise against trying to adopt any of the animals until you know they are clear.
At this point you are relying on good quarantine proceedures from everyone who has been taking care of the snakes - and that probably includes people who knew nothing about them or the diseases they could carry.
The last thing anyone wants is for your charity and kindness to lead to the death of your existing collection.
dr del