two piece mermaid prom dresses

MEMBER REQUEST - Hello. In January I ordered my bridesmaid dresses, yesterday I received a letter to say the company went into liquidation this last week!
With less than 3 months to go till our big day and all accessories bought to go with the dresses we had on order does anyone have any suggestions where I can find short navy or midnight blue bridesmaid dresses for 2 adult bridesmaids?? two piece mermaid prom dresses
Ideally London/Essex based!