Where can i find a suitable bikini for my winter holiday?

i need to find a bikini for christmas. i have a bit of a jelly belly and wobbly thighs, at a curvy size 14 i want to be able to look good. i dont want to wear a one-piece because my boyfriend will take the micky (even his mum will be wearing a bikini so i don’t want to look like a wuss) all the websites ive been on want ridiculous prices! please help.