Rear Fog Light - LT Focus Zetec hatchback

[gnomes_skj]

I have a Zetec hatch with a reversing light left rear passenger side and right rear fog light.
Rear night vision is limited when reversing with only the one reversing light, and I am wanting to replace the fog light with a matching light, similar to the left rear unit (and do away with the fog light altogether).
Any ideas/comments please - for example
1) possible or not?
2) where to get the part, and likely cost.
Thanks

[fairmont1998]

You can find the reverse light you want here :
http://www.european-parts.net/catalo...230cdbf75a5b41