Can anyone please help and give me some advice?

my mam wears dentures and my dog has jst chewed them into tiny little bits. i no this may sound funny but she is absolutely devastated, she was supposed to be going out tomorrow night and it's her birthday next week and we are going to be having a party for her. i would think the dentist would still have an impression of them...does anyone no if this is correct and if so, how quickly could she get a new set? she also gets her dental treatment free. is there anything anyone can suggest and please if you are going to put funny answer, i'd appreciate if you didnt because i am desperatly trying to find a way of sorting this out for my mam, i hate to see her so upset!