Nursing clothes so expensive!

I’m so annoyed by how maternity and nursing specific clothes are priced at a premium! For the most part, I’m trying to stick to regular clothes that are nursing friendly, but I’m trying to stock up on some nursing camis to layer under shirts/sweaters and they’re so much more expensive than regular camisoles just for the extra clip. At Old Navy they’re like $20 a pop (while the same camisole without the clips is around $5!)

Anyone have any recommendations for where to get some decent, not super expensive tops?