Where can I get a replacement Nut for my guitar!

I have a Vintage Cherry red SG, This is not a Les paul but a copy, after a new nut as my son has broken it aarrgghhh! We were from UK now living in Spain and do not know where to go for it.

i have looked on the internet and only seem to be able to buy a blank bone option that needs to be shaped and groves cut into.

Does anyone have any ideas where to buy replacement parts.

Cheers Guys

perfet thanks very much, would you know the brass chrome ones would they need filing etc to fit?

thanks again

depends if the are the same size as your current nut, if not they could need filing, tbh id drop them an email and ask if they have anything that'd fit nicely in your guitar