Mother of the bride outfits?

Hi everyone!



I am hopefully getting married this June and I'm trying to help my mum find a dress. The issue is that a lot of mother of the bride outfits are very older lady looking. And also so expensive! My mum has no interest in paying hundreds for one day. We have very different taste, so a lot of nice dresses I've seen online are totally not her cup of tea. She likes classy, straight cut lines and all that. So many dresses are lacy but she doesn't like lace. I'm just wondering where people's mums have gotten their dresses from? I'm helping because I know it will stress her out if she can't find anything bless her!
Thanks in advance!