How do I replace oven insulation that has been soiled by mice and smells bad?
I'm so sorry for your loss.  A Viking is a terrible thing to waste. Disassembling a Viking oven/range is not a job for a DIYer.  Look for a restaurant supplier in your area or a  Viking dealer to get a competent tech to do the work and bite the bullet and have it fixed right.  The insulation is not something you can buy at the local Home Depot. It uses a specialty high temp spun fabric insulation . If the job is not done properly, it will be a FIRE HAZARD!!!!  This is a  safety issue not worth saving a few bucks on. The Viking is worth saving if you can.