On Jul 6, 10:16*am, GB wrote:
I have a brass lion's head screwed to the wall which I guess is worth
£100-200. I would like to buy some security-headed screws with a brass
finish, but I am blowed if I can track any down. Where's a good place to
buy this sort of thing? (BTW, I only need 4 screws.)

Get some brass round head screws. When fixed, fill the slots with
solder.
However well you fix it, it can always be prised off by someone who
just wants the scrap value.