Any good bodyshop will be able to do it for you as long as they put plates in over the holes, but Id think carefully as having two doors newly painted on an older car can look funny if the colour match isnt perfect. With a bonnet or boot it isnt so bad, but with doors it would show a mile away unless you had the whole sides done. The other problem is getting locked out! My cars central locking packed in the other day, and my boot lock is buggered, so I was very glad I didnt have my car delocked as I intended a year or two ago!
Dont know the name of them, but theres an excellent bodyshop off Penarth Road in Cardiff, in an industrial estate where the dual carriageway flyover goes over the top. One of my parents cars was done there and the work was A1.