Here is the Lancaster Instrument Panel as reconstructed by his son in this story about the man who restored
R5868 S for Sugar at RAFM Hendon:-
Veteran spent seven years and £250,000 building life size Lancaster Bomber replica | Daily Mail Online
As Geriaviator describes, the feathering buttons and fire extinguisher switches are at the lower RHS of the panel immediately in front of the standing FE. All in black though, in this pic at least. Hope you can just make them out.