Technically yes but it's a can of worms, the slab has to be measured very accurately on width and height, hinges need to be routered in the exact same place.....to the millimetre, the locking strip on the new door needs to be the same as the old otherwise you need to move the keeps on the frame to suit the new door so then you'll have holes, it's just a complete nightmare, for the sake of another 100 quid for a frame it's just not worth the faff