'03 TL type s headlight problem

Having a bit of a problem with my headlight. I see that water started leaking inside. The low beam was going on and off and eventually stopped working. I was wondering if anyone could suggest a reputable site for replacement parts? and if you have any experience with replacing headlights/low beam bulbs, I'd appreciate some help/tips on how to do the work yourself. I am not quite sure if it's just a bulb or some of the electronics are fried at the moment. It's left headlight and it looks crowded on that side. What exactly needs to be taken off to get to the headlight?

Thanks.

Hey you can try 'carhidkits' over the internet.