I also replaced a H2O display today. ( it's not my first time opening H2O but my first time actually doing the display replacement ).
The broken H2O was a lucky find on Ebay ( under 10€, basically paid shipping only ).
Before ordering a new display, I verified it worked perfectly fine otherwise, including the touch screen function. Well, I'd probably have ordered a display even if the touch didn't work...
The new display was 25€ from aliexpress so the whole unit cost me 35€ ( plus my own sweat and tears during the replacement process ).
Anyway. I'm lazy. So, I did it all without taking the PCB off. Didn't replace the old glue pads either, well I would've but none to be found in the house and couldn't wait. Anyway.
It works.
The display quality is even perfect, absolutely zero issues (so far).
There was a bit of panic with "water on the screen" message because the front bezel was not aligned perfectly on first try reassembly (it has those 4 little notches that actually have to sink into the PCB itself to make it work - first time I ever notice that and there is no way to see it with the backplate on).
Your pictures were very helpful, particularly the exact position of the glue pads under the display. Even so I didn't quite manage to take the broken display off in one piece... preserved the front light LEDs of the old display (LED is a glue stripe that peels of, if you do it carefully), so I have some (miniscule) hope of repair if one of the now three operational H2Os ever suffer a frontlight failure.
I will try to upload some pictures later.
And yeah I'm also totally cutting a hole into the back of this one for easy internal SD card access.