Help... in need of a car body part...

Any idea where I stand on this situation - and what's the best thing to do?

My rear left door is dented in quiet a bit...
(on my black 2001 Chevy Impala)

Any best way to go about resolving this?

What are all of my options?
a) bodyshop $300+
> and I am not sure how good it will look, cause it's quiet a dent...

b) to order a new/used 'black rear left door shell/panel'?
b1> will the door stand out due to being new and car being 4 years old?
b2> will this cost me even more? Is it a good way to go?
b3> any good places to order from?

c) any other options?

Any tips, tricks, links, suggestions are much appreciated

Thank you all...