This shouldn't be a problem. If you have icons (preferably black) that you are using now, send me a Dropbox link or something.
If you don't have icons, let me know which ones you're looking for and I'll try to track them down. This will take me a while, though.
Anyway, just an FYI, dock icons are about half the size of the weather icons, so I'm not sure how they will look with the debossed effect. I guess we'll find out!
It's late... going to bed. I will follow up on this with you tomorrow.