ᐅ Replace Ikea Pax wardrobe carcass with a new one measuring 3.00 meters?

Hello,
I have the following problem.
I have a Pax Tonnes wardrobe (3.00 x 2.36 meters (9 ft 10 in x 7 ft 9 in)) divided into 4 carcasses (1.00 - 0.50 - 1.00 - 0.50 meters (3 ft 3 in - 1 ft 7 in - 3 ft 3 in - 1 ft 7 in)) and a 3.00-meter (9 ft 10 in) sliding door with the floral/asthma pattern.
Unfortunately, the Pax back panel has started to develop mold and has penetrated into the wood. (apartment problem!)
My question now: Can I simply buy new 4 carcasses now or replace the old ones with these? Currently, there are also 0.50 meter (1 ft 7 in) and 1.00 meter (3 ft 3 in) wide carcasses available.
I would rather not throw it away as bulky waste since I am moving soon.
Treating mold is not an option for me! Only replacing the carcass.

Thank you very much for your answers.

I wouldn’t experiment with that either. You can simply replace the carcasses with new ones.