Protector Bag for Pram when Travelling?

Hello,

Can anyone recommend any good bags to protect a pram when it’s in the airplane hold?

Im due at the end of April and planning to travel at the end of May with baby so it would need to fit the carrycot of the pram as well as the frame - all the ones i’m finding seem to be for strollers?

I just really don’t want it to get all dirty as they’re not cheap are they!!

Thanks xx