There's no point trying to source any 15 year old underlay when you can go to your local carpet shop and get an off cut of new, better material underlay just cut it yourself with a stanley knife

The battery trays come seperate or with the part of the bulkhead panel, don't forget, the escort/orion wasn't/isn't exactly a rare car so don't pay more than £20 for the bulkhead panel cos someone on ebay has written "RS" in their advert