went to the scrappy for 306 parts, bought this instead

[ash240970]

Right - the seats should come up ok if done properly with a wet vac after scrubbing and anti fungicidal treatment then drying out with heat and I would take the carpet out and treat that the same as the seats - they need to be dried out thoroughly though so I suggest against a radiator I the house somewhere.
Once its all refitted and if any odours still remain ( highly likely) you can get an odour bomb that you set off in the car and it releases a smoke that penetrates the fibres killing off nasty niffs