Hi,
Have you tried YRM Metal Solutions?
I've bought replacement Range Rover Classic panels from them and have been impressed with the quality of the panels and the delivery service. Ordered two replacement panels from them yesterday at 12:30pm and they were delivered at 10:15am this morning!
They do replacement panels, brackets etc for the Classic, Disco, Defender and Series.
Their web site is
http://www.yrm-metal-solutions.co.uk/I've no commercial association with them - just a very satisfied customer of theirs!
Cheers,
Ross.