The Bulbs are under Stealth Bulbs from Google, just search the size you need, I think they are 1157 . as far as the grill goes, I'm probably going to just get one of the aftermarket ones, don't know anyone that deals with plastic, I wanted to make the grill really deep... with the mesh at the back. But all takes money and kinda broke right now.
I was worried about the rain, But these last couple of week we got a shit ton of rain and I drove to work and back through it and not one hickup... so as long as I don't go head first in to a 3 foot puddle, It should be ok. A little rain here and there is nothing, its when your sucking up buckets of water is when its a no no.