Where can I buy old plane/train bits?

[Shakermaker]

Where would be a good place to go and look around for bits of old trains and planes? Nothing "huge" as I can't quite justify storing a Trent in the living room, but smaller parts can be made into interesting furniture/fixtures etc (I despair at using the term "upcycling" but that's what other people might use)

I expect there are some dealers out there where I could go and wander around and see what they have?

[Shakermaker]

some good stuff there. £100 for 3 seats from an A321 on ebay at the moment, might have to get them for the shed.. no idea why though.

Cheers guys