Here are a couple more.
Another bundle with these stories:
The Bimbo Curse
Helena Becomes a Bimbo
Coach: Becoming the bimbo
Becoming the Goddess
From Geek to Slut 2
From Geek to slut
Transformed Into My Friends’ Bimbo
Witch’s Curse: Swapped
Swapping Places Becoming A Bimbo
Then some loose stories:
Swapped Into Her image
Coach - Becoming the Bimbo
Changed into the Neighbors Wife
The last one is included in the bundle Animal_House posted, but it's nice to have it separate as well.