Vintage Brooks Saddles?

[dav1d]

I'm looking for a vintage Brooks saddle, ideally from the 50's or a replica for this bike:



I know I can try eBay but I always get outbid! So does anyone know where I can get one, either in or around the Greater Manchester area or online?

I'd prefer secondhand if it's in reasonable condition and cheaper than new.

Also, is the correct chain guard for this bike: here?

Thanks!