Did the taxidermist tell you which items were infested? If so, can you separate the damaged items from the remaining collection to contain the problem?
One of the best things you can do now is to get familiar with how to identify an infestation so you can confirm that it is the bug you think it is and identify items affected and attempt to contain the infestation. I posted a few short pamphlets that can get you started and help you figure out your next steps. I just did a quick Google search with “infestation textile collection” and there was a lot more information that could hopefully be helpful for you.