Plain black yoga pants?!

Rachel
I'm not ready for maternity yoga pants. I've been wearing Gap and Fabletics, and this week everything in solid black high waist is either (a) sold out or (b) $80 a pair. I wear these for work every day and need to get more. Any suggestions on similar brands? Old Navy hasn't been very good to me lately, and all the maternity pants go up past my boobs!