Mia,
If you need more absorbency, consider wearing the excellent Dry 24/7 with a booster.

I am a heavy wetter and that is what I do. This way you keep the Dry 24/7 that you have said fits you well and fit is so important.
Just choose a size of booster pad that leaves some space on each side as a gutter between the booster and the internal standing leak guards. Be aware that some brands of booster pads expand so high that urine can overflow the leak guards on some diapers.
Re Better Dry, NappiesRUs stocks them as well as Amazon UK. A search should identify several online suppliers. However, I agree with Brian that at night under the sheets it really does not matter what pattern is on a diaper. If you can find Crinklz and not Better Dry, try a sample of the Crinklz. I will note that Better Dry/Crinklz, in size Medium, has an ISO rating of 4,000 ml, about the same as a Dry 24/7.
--John