Puzzle frames

Hi,
My wife got all interested to building puzzles suddenly. She now completed a 3000 pieces puzzle which is lying in our living room floor. We cannot find a Frame to fix it. Size is approx. 121.5*81.5 CM.
Please let me know where we can find cheaper and bigger frames. Tried in Manor, Migro, Coop without any luck.
Want to try in Ikea next.

Thanks