Dent repairs

Hi,

I have an ageing Skoda Fabia 2000 W reg that was in good condition but has succumbed to a few unfortunate dents - they are quite large.

One is in the rear door (driver's side) - upper part, the other is in the front wing on the passenger side, on the wheel arch bit.  

Any suggestions how to fix this cheaply, I've left it for so long.  Heard you can get dent repair people but not sure if it can be done and the cost.  Was even thinking of finding an old white wing and fitting it and a new door, think this might take ages.  

If anyone has used one of these dent repair places in London please let me know and give me an idea of the cost.

If you have any of the above parts in white that would be good too!

Might leave it otherwise - it is an old car but still looks fairly smart and has no rust ! 

Nigelcm