Welcome to the club mate, I'm not really sure personally where you could, but you could try http://rallynuts.com/roadsport_nissan-micra.asp or there's another online store where club members get 10% discount on all goods, check with someone else for that one mate!
By any chance is your car a yellow Super S? I passed one which was up on some ramps at a scrappy, but looked like was getting quite a bit of work done to it..