Looking for recommendations on where to get a mother of the bride dress for a Fall wedding

I (52F) am looking for a dress for a Fall wedding - it`s an afternoon wedding and may be outdoors (weather dependant). Struggling to find a quality dress that doestn`t look really frumpy, but also doesn`t look like I`m competing with the wedding party.

I tend to wear classic cuts and styles - no frills or bling factor. My preliminary search outside of wedding-specific sites is discouraging...when you eliminate black, low cleavage and mini/above the knee...it`s amazing how limited the options become.

Any recommendations in Ottawa / Ottawa Valley or Montreal.