A little help appreciated

Ok, basically I have a father (no really!) and he owns a lotus elan, fathers day recently passed and i had an idea of what to get him, however... I had no idea how to go about it, basically i want to replace the cover on his numberplate and possibly the lights, however I don't know the 1st thing about cars, as Ive only just started driving, :banghead:

so a couple questions...

what do I call this section of the car?
Where is the best place to buy it?
How easy will it be to fit with the help of the mechanic?
and how much would it cost?can you please email me on this, dan..

danc@dsl.pipex.com :evillol: