Looking for the body of a steel framed old railway carriage to turn into a garden shed (think they were called 'Goods Wagons' - about 18 foot long).

Preferably one with sliding doors but don't really mind as long as the metalwork is in decent condition (will replace wood panels anyway).

Will need access for a flatbed/HIAB to pick it up, and not looking to travel too far from Ewyas Harold in Herefordshire.

Will pay well over scrap price for a decent specimen. If anyone has advice for how else I could find one that would be much appreciated. Cheers!