The Beeb's current new series Who site has part two of the Sarah Jane story, here, dealing with the Baker years and 'K9 and Company' pilot. It must be said the photo's which accompany it are not up to much, so here's some different ones!
With Tom (in partial costume), an early Baker promo pic.
From Terror of the Zygons. Pinched from the BBC Norfolk website, which has quite a bit of Who related stuff... here.
K9 and company, grabbed from the Classic Who site's K9 gallery, here.
And from Who Image Archive's Sarah Jane gallery, here.