4-walled shower cabin

We are renovating the bathroom at the house we just bought and want to get rid of the bathtub. We are planning on getting a shower cabin 700 x 1000 (to 1650).

I am having the hardest time finding a 4-walled cabin of that size. I am wondering if buying a 2 or 3 walled one is an option and maybe ordering extra panels from somewhere?

Using the tiles as a wall to the shower is not an option as the tiling is quite old and we are worried it will start leaking and we don’t have the money for a complete bathroom remodel at this stage.