I’m a personal trainer & I’d like to add mat pilates certification to my education.

I’ve been researching pilates schools in the Northern California but am finding quite a variety and nothing that begins before next Spring, at least in my local area. Also, the courses I have found are quite costly and time consuming (4-6 weekends long.) Does anyone know of a week-long or shorter pilates mat certification training where I could get my teacher certification? Northern CA is preferred, but I’d travel to So. CA or surrounding states for the right training. Thank you!