Thanks to Edgar for finding on ebay,check out a promo photo of Gwen from 1992 when No Doubt was first signed to Interscope:
EDIT-Eric Keyes,longtime friend of the band,replied to a thread on the ND forum about the photo to say that he doesn’t remember it being an official promo shot,and neither does Tony;just a word of caution for anyone who may want to bid on the photo:
I passed this on to Tony and his response was “huh, i don’t remember either!” so bid at yer owe risk. The photo looks familiar but I don’t remember single band members on the Promo Pics, it’s always been group shots… but again this is my own personal recollection =P Good luck.