n00b question - 2000 Tahoe 5.7 4WD

hi all, Im a n00b here but have a question...

I change the bulbs in my go lights a week ago and then noticed today that both lenses have fallen out

Can anyone suggest the best place to get replacements at a good price?

Any help would be apprecited

Pix for clicks:

http://www.mypicshare.com/thumbs/20061230/sjlolhdj.jpg

I can't see anything in that picture. Do you have one of the lights?