a new packet of aquilas (which are generally considered the best quality uke strings you can buy) are only about £12 online,
i'd recommend just putting up with it and buying proper strings because frankly if you want to get any kind of decent tone out of a makala you wanna invest in decent strings.
couple this with the fact they last for AGES, its really a false economy to cheap out on them.
still classical guitar strings might work but they'd be FAR too thick and would muddy up the tone something terrible.