I don't have a personal recommendation. I can't recall for sure, but I thought I saw a Deva stylist in Simi Valley listed on the Deva website. I know that's not TO, but it's not too far. I'll try to find the link.

ETA: http://www.devaconcepts.com/

Here's one in Thousand Oaks from the Deva website:

Jamie's Hair Design
Thousand Oaks CA
Brenda Frias - cut and color
Lissette Monagas - cut and color
805-496-4747