I'm going to put this out there. Sure I could corner the market and mark them up but that's not the way I like to operate.
The ilco key blanks for Defender ignition $30 for a pack of TEN!
When I needed keys for my Disco, it was a matter of finding a good locksmith.....
ILCO Key Systems - Vehicle Key Blank Cross Reference
A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.
I don't know about the brakes, only their unreliability.