Foamy how bad is the dent in the door? i can save you load more money than forking out for a new door.
If the dent has round edges and not sharp flat ones then do this:
Rub soapy water over dent,
Apply bog plunger over dent and squeeze it on to create sucktion.
pull on plunger and remover dent,
If small holes remain apply quick sand filler for your local Halfrards
Sand, prime, sand, paint, sand, gloss, sand, buff.
If done right this will take out a dent without damaging the paint.
I got satisfaction last night when i put my feet up in my man cave with a glass of JD, a smoke and my Haynes manual in my hand....................lasted a whole 45mins untill the wife came home from work and said "YOUR NOT SAT IN YOUR POXY SHED AGAIN!!"
some women never learn