Maternity work pants?

Sa

I'm looking for recommendations on a good cheap pair of maternity work pants. I work in childcare so our dress code calls for work pants (I usually wear pretty stretchy ones but the band sits on my belly and is uncomfortable)

Or even a pair of yoga pants that look similar to work pants could work too.

Any ideas as lots of places seem to be over $30 which seems quite a lot when I pay half that for one pair usually normals ones.