Getting a duplicate key cut, 1200 sport

I’ve done a stupid thing and thrown my spare key away by mistake in an old pair of oily overalls!
I still have one original key.
Does anyone know the easiest/cheapest way to get a replacement cut/ordered?

This place in Belfast can cut and code a new key if you have an original but I am sure you will be able to find someone nearer to home. I think the place in Belfast charges about 30 quid.

get an original key , and cut it, code it …job done . People have been cloning keys, this  causes themselves/next owner problems down the line.
quote from guzziology… no cheaper or easier approach is the best way .